What's funny is that if we had taken the approach with Beasley that we took with Williams, we probably aren't having this discussion. Beasley at the 4 off the bench, sliding Love to the 5. Tolliver starts as the 3. By the way, Tolliver is the only guy whose versatility is actually a good thing, the rest of the guys play too many positions offensively and not enough defensively; Tolliver is the other way around. Does pretty much the same thing offensively, hustles, sets picks, moves the ball, takes good open looks, and on D he'll play post, perimeter, whatever. Keep that man in the starting lineup.
As I've said before, while Williams and Beasley are pretty similar players at this point in terms of skillsets, Williams' decision making is much better. I actually think it puts him as a more athletic version of Tolliver offensively (though he's nowhere close defensively). Beasley's mindset would be great as a bench scorer.
Given that we have Randolph, Beasley, Tolliver, Love, and Williams as natural PFs, and given that Tolliver can defend the 3 and doesn't suck possessions, the logical thing to do is to swap him and Beas and see if Beas and Williams can play next to each other given that Williams seems like a pretty unselfish offensive player.
This still leaves Randolph in no-man's land, although I would hope that he keeps working on his hustle, focus, and post defense. He could be a center even without putting on a ton of weight if he just focused and learned defensive footwork and to be aggressive early in possessions to prevent the other team's big man from gaining deep position. KG is not all that much bulkier than Randolph, though he's much stronger, or at least plays much stronger. Some of that perceived strength comes from his aggression though.
As for Beasley, I think he'd actually thrive without the pressure on him. He is not a guy you want to have the ball at the end of the game, but is definitely a guy I could see with Ridnour carrying the team through chunks of the 2nd and 3rd quarters and putting up huge numbers.