I can't get excited about a quartet where Bradley is by far the best shooter among the 4. Need Steph at PG to make the spacing work.
Also, realize that since they would only have to outscore the other team to win the game, that'd mean they need only average in the low 90's as a team. Even if the fifth ingredient is merely an above average shooter and primary option, I think they could win a lot of games 92-82, etc. 50-59 wins. If the fifth piece of the puzzle is a world class shooter and go-to closer, now we're talking 60+ wins, championship contention.