There aren’t really any dominant big men who are (1) available on the market or (2) dependent on strong PG play. That list is very short in that it’s basically Embiid, Jokic, AD (none on the block). The second ground behind them are guys like Bam and Sabonis but Bam is the only one who takes significant leaps playing with Trae, IMO and OO at his peak hopefully replicates that.
As for the middle class players, my thoughts are Trae actually helps their game by getting them more open looks, especially on the wings. The problem with JC/Kev is they weren’t aggressive enough (Kev) or weren’t capable (JC) of creating for themselves within the flow of the offense like Bogi (another middle class wing), is.