I agree with much of what you say but I wouldn't say Paul is the greatest Christian who ever lived.Paul did understand and taught the Rapture, 2nd Coming, Judgement seat of Christ, as well as many other revelations, that are regarding the "end times".
However, you dont have to be an Einstein to realize that if God gave John "The Revelation" then that is the Full Revelation.
Reader, the 11 Apostles, understood the Trib-Grt Trib, before Paul was called into the "time of the Gentiles" Ministry.
So, even before Jesus ascended back into GLORY (to later Call Paul into the Ministry)....., the 11 original apostles, understood some "end times" as Jesus in Matthew 24, revealed it to them, and He had already revealed some "end time" revelation to the Apostles, before he was Crucified.
Paul's "mission" "ministry" was to REVEAL = "the Gospel of the Grace of God".... as "The preaching of the Cross, is the Power of God, unto Salvation, to all who BELIEVE"..
See that "GOSPEL"?
That is "Paul's Gospel"... and that was given to Him by Jesus.. And Paul gave to the 11 original Apostles, in Acts 15.
Paul's mission -ministry to the CHURCH, the "Body of Christ" was to provide you with "church Doctrine."
Paul main ministry was to start new local churches.. and so, he started , many, and you find some of them in Paul's letters to them..
Corinthians
Ephesians
Galatians
Thessalonians
Paul said that we are to learn his Doctrine and study his Lifestyle and Ministry as the example, the pattern, for Christian Discipleship.
This is why he told you.."Be a follower of Me, as i follow Christ"
Not a worshiper... but a follower......as Paul is the greatest Christian who ever lived, and so, we are to learn his Teachings, His Lifestyle, His ministry, and emulate it....= DO That.
I do believe that would be up to God to decide.