I spent the day skiing Snowbird with Bill Romanowski yesterday. He was a surprise member of a group I skied with. We broke off with one other guy and schralped the hell out of the powder in freshly opened terrain. He can actually ski quite well, and we were in and around the rocks/cliffs a bunch. He's a beast. Friggin hands built for tearing down running backs. You can tell he's had 21 reported concussions though. I asked him a bunch of stuff about his training, etc. He never missed a game in his 16 year career which was a record for consecutive games. And of course he has four Superbowl rings.
I'll take Brady for best ever though. He has just had too many amazing games and gotten his team to the Superbowl(and won) or near it too many times. There are others in the conversation though. Imagine what Barry Sanders could have done with a good team. And Jerry Rice is up there