The story of Joseph, as a type of Christ, supports this (imo):
20 And Joseph`s master took him, and put him into the prison, the place where the king`s prisoners were bound: and he was there in the prison.
21 But Jehovah was with Joseph, and showed kindness unto him, and gave him favor in the sight of the keeper of the prison.
22 And the keeper of the prison committed to Joseph`s hand all the prisoners that were in the prison; and whatsoever they did there, he was the doer of it. Gen 39
......and the baker and the butler as types also agrees with the notion of Sheol as a hold for the wicked and the righteous.
21 And he restored the chief butler unto his butlership again; and he gave the cup into Pharaoh`s hand:
22 but he hanged the chief baker: as Joseph had interpreted to them. Gen 40
.....and as Joseph was raised up out of that prison and was elevated in authority to second only to Pharaoh, so did Christ raise from the grave and ascend to sit at the right hand of the Father where He reigns today over His kingdom, and everyone must come to Him for their spiritual food.
41 And Pharaoh said unto Joseph, See, I have set thee over all the land of Egypt.
57 And all countries came into Egypt to Joseph to buy grain, because the famine was sore in all the earth. Gen 40
So you think the OT saints weren't in heaven before Christ?