Some interesting and insightful posts here, friends.
RemnantRD, nice to meet you! I appreciate your perspective, and will first respond by saying, in answer to your question, that no, believing in the authority of Scripture and the guidance of the Holy Spirit would not be considered sola scriptura (n.b. Catholics too believe in the authority of Scripture and in the guidance of the Holy Spirit). But in your post, you also seemed to imply that you take issue with Catholic teachings that cannot "be found at all in scripture." Your statement here sums up what sola scriptura is--namely, an approach to Christianity that argues that "if it's not in the Bible, it must not be Christian." But the irony of such an approach is that it is unbiblical. The Bible nowhere says, "Only what's in the Bible is true and Christian." In fact, the Bible says that opposite, when it tells us that we must "keep our traditions that [we] were taught. either by an oral statement or by letter" (2 Thess. 2:15). So our authority, as Christians, is not the Bible alone, but the Word of God alone, which includes the Bible but also includes oral Tradition.
Who is the keeper of the oral Tradition? The Church is. In fact, Scripture tells us that the Church is the "pillar and foundation of truth" (1 Tim. 3:15). So whenever there is a debate regarding true Christian belief who gets to decide? Not the Bible alone, because (1) that's not what the Bible teaches; and (2) following the Bible alone has resulted in thousands of different beliefs and denominations of Christianity, each claiming to teach the truth but each disagreeing about what truth is. No, the Bible teaches that the Church gets to decide matters of faith and morals, as She does in Acts 15, when Her leaders debate whether or not circumcision is necessary and then make a binding decision on all the faithful around the world, saying, "It is the decision of the holy Spirit and of us..." (Acts 15:28). Only the Catholic Church behaves this way today.
I understand that you believe that the Catholic Church believes many things that contradict the Bible, but I of course disagree. Could you provide some examples? God bless, my friend.
It is nice to meet you too e.daniel.box.
What I stated in my original post was Sola Scriptura + the guidance of the Holy Spirit. In addition, scripture tells us to test the spirits, even the Holy Spirit, to ascertain whether they speak truth. What do we compare this to? Well, since the Roman Catholic Religion wasn't established until around 300AD, then it certainly wasn't the Roman Catholic Religion and the "Oral Traditions" of the Roman Catholic Religion. We would then compare it to scripture.
To be fair, I never stated that if it cannot be found in scripture it's not Christian. However, as the scripture is our blueprint, we can use the precepts found in scripture to establish what we should do as Christians. When things do not line up with scripture, we throw it out. If things aren't asked of us to do, yet we assert they are tradition to follow and it doesn't line up with scripture, we throw it out.
Who is the keeper of Oral Tradition? Originally it was the Jews. However, oral tradition will not contradict scripture. If we have 2000 years of tradition in error, then it doesn't change the fact that it is error. We know the early church was established by the apostles meeting from house to house and breaking bread daily. The oral traditions spoken of in the bible were recorded in the bible, hence the fullness of scripture. Interestingly enough, even until Jerome, the apocrypha were not included in the canon of scripture used by the Roman Catholics. It wasn't until much later that the apocrypha were added in and called the deuterocanonical books. The Eastern Orthodox church has even more apocrypha. As we know the apocrypha have doctrinal assertions which contradict the entirety of Scripture (66 books: Genesis - Revelation), we know this isn't included in our understanding of scripture from a doctrinal basis. They may contain factual history and thus good to read for that aspect, but we know they are not inspired as God will not contradict Himself.
If we believe that 2 Timothy 3:16-17 NKJV is established:
16 All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, 17 that the man of God may be complete, thoroughly equipped for every good work.
We know then that every line of scripture is inspired by God to mankind through the guidance of the Holy Spirit, we can then infer that whatever is written that is inspired by the Holy Spirit will not contradict other writers of the Bible since the Holy Spirit inspired them as well. We know we have the entirety of scripture found in 66 books because the entire bible is harmonized. Nothing in scripture contradicts at all when understanding the scriptures in correct context. Many atheists try to point out contradictions, but when looked at through the lens of scripture, we find there is no contradiction at all.
Since you asked me, here is a short list of examples of Roman Catholic beliefs/doctrine which contradicts scripture. I don't like doing this as it makes it seem that I am "bashing" the Roman Catholic Religion, but you did ask

1 ) Mary: Praying/Veneration of Mary - Mary the: Mediatrix/Co-Redeemer/Helper (blasphemous) - Mary being sinless - Mary being assumed into heaven (not scriptural) - Mary being born without sin (not scriptural) - Mary never having other children (contradicts scripture)
2 ) Prayer to dead (physically) saints (Scripture says this is prohibited and likens it to divination and witchcraft. We can look at the example of Lazarus and the rich man where the dead do not communicate with the living). Your explanation does not line up with scripture.
3 ) Establishment of the Pope (Vicari Christi and Pontificus Maximus) --> Peter is the rock (Petros) and the Rock (Petra) which the church is built upon is the revelation that Jesus is the Christ, the Son of the Living God. Peter told people not to bow to him or kiss him as he was simply another worker along with the other saints.
4 ) Pagan imagery (sun rays/disk behind the heads, Immaculate heart ie sun god and moon god/dess babylonian practices)
5 ) Real Presence/Eucharist and Transubstantiation (Yes the EOC and some denominations do this)
6 ) Forbidding priests to marry (also nuns) = Doctrine of demons (1 Tim 4:1-3)
7 ) Commanding to abstain from foods which the Lord God has given us to receive with thanksgiving = Doctrine of demons (1 Tim 4:1-3)
8 ) Papal establishment of saints (all born again believers are saints and of a royal priesthood)
9 ) Purgatory (not scriptural) - when we die, we go to our eternal destination
10 ) Catechism of the RCC contradicting scripture (see 10 commandments + much more)
11 ) Historically persecuting those who did not believe in the Eucharist and killing them (Waldenses & Abrigenses)
12 ) Historically persecuting and killing those who made bibles in a language the people can read (Wycliffe and Tyndale)
13 ) Indulgences - esp seen with days of "Holy Obligation"
14 ) Rosary - Mary is not the Queen of Heaven --> the bible mentions a queen of heaven... and it's not good. This also ties into point 1.
There are more, but we can stop there for now.