The OT saints entered Paradise after the NT thief entered. But who entered Paradise after the resurrection on the third day seems to be your issue, not mine.
This has been Paradise since 30AD. This includes all OT and all NT since 30AD:
"I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:"
"After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;"
Both verses are the exact same group of people from different perspectives, ie camera angles. You do know what a camera angle is, right? You claim many yourself from this book.
These two verses portray all OT and NT saints. There is only one type of saint, believer, redeemed soul. All humanity born to Adam and Eve in their fallen condition, changed out of Adam's dead corruptible flesh into God's permanent incorruptible physical body.
You can spiritualize or symbolize existence all you want, but you cannot enter Paradise in Adam's dead corruptible flesh. You can enjoy seated in heavenly places with God's permanent incorruptible physical body once you enter Paradise.
I am simply asking questions. Why are you so defensive? What are you hiding?
So, are the OT saints part of the Church? This is not a difficult question.