I think Boozer is probably the best fit of the three high level guys, just because I've always been a fan of Brown and Tatum at SG/SF vs SF/PF. It gives both guys more size advantages to attack.
But with Tatum coming off the achilles his future may just be at PF from here on out. Given that I kind of wish there was a higher level Center option in the draft. A rim protecting 3 point shooting 6'11 or bigger guy would be ideal.
In reality I'm not sure fit matters that much. I think the top 3 guys could all be impactful pretty quickly, but while there's some interesting guys in the 4-10 range I think they might take longer to be positive impact players just because that's usually the case. Guys in that range often aren't positive impact players in years 1 or 2, it usually takes a few seasons before they contribute to winning.