well unfortunately thats the level of player its gonna take to be a true contender. in my eyes at least. (JJJ, Chet..) There are young guys out there that could still develop into a player kinda like that. Eason, Patrick Williams, J Smith all still have untapped potential.
Maybe Keegan becomes a good enough defender and rebounder to play the 4 long term. And they find another wing defender for the 3 spot.
All things considered (the limited selection of such type of players being available, the previous failure that is Domas + a shot-blocking stretch-big), I think this is the most likely scenario for us to become a legit contender.
From the eye test so far in 1 1/2 seasons, I'm not so sure as well that a shot-blocking big even with a capable enough 3pt is what matches perfectly with Domas. At least I don't think we have enough evidence to prove otherwise. But the one thing that will work and for enough certainty is BBIQ. It is very clear that if you are smart with the game, you'll have a respectable two-man game with Domas. Keegan Murray had shown us with a large enough sample size, even with his quiet demeanor, that he is smart with it. And thus the two-man game between him and Domas has been pretty well.
My point is, I could be wrong and that Domas just hasn't found that stretch big who shotblocks that works with him. But since those are rare like unicorn currently, I think it'll be a better route to work Keegan into a full-time 4 (He played some 5 in Iowa, so at least he got the moves and the know-how) and find a wing defender with high BBIQ.