Outside of Drew Brees?
Marques Colston is my all time favorite Saint period. For any number of reasons, a 7th round pick who likely wasn't even expected to make the team....in hindsight his combine numbers for a WR his size where pretty mind-blowing, he was a much better athlete than most believe....but....he also wanted to be great, he worked his tail off to become what he was...and I honestly believe he is the most underrated WR of all time....Tough as nails, never complained, total team player....