I'll take Bradley, comfortably. He's one of those centers who gets an unfair amount of hate just because he's been dunked on by alot of people. To be honest, he would be one of the best centers in the league if he was playing at the moment.
One of the best shot blockers this league has ever seen, is actually ranked first of all-time in block %. Was also a very good defensive rebounder and defender overall and actually improved his offense throughout his career. He could also hit his FT% which is a huge considering some of todays centers struggles there. His biggest problems was scoring efficiency and durability simply because he couldn't log enough minutes.
Looking it up, Shawn Bradley actually has a PER of 16 over his career and peaked 19.6. That's damn impressive for a useless big body. Sure he had flaws but he was a good roleplayer, no doubt.