How about a guy who was really good and had a great career but whom most people wouldn't know? Does that fit the spirit of the thread?
Kevin Mawae is one of my favorite Tigers of all time, easily top 3, if not #1. Great, great attitude, and a great player to boot. He was recruited to the "glamour position" for O-linemen, left tackle, but things changed and circumstances dictated such and such, and he wound up playing center for LSU. His position wasn't the only thing that changed, as Mawae signed up to an LSU team that had just won a pair of SEC championships to cap the 80's, only to watch the team fall into a pit that was LSU football of the 90's. A 4-year starter, Mawae played on some truly wretched college teams, although he distinguished himself rather well. He went on to a 16 year career at center in the NFL, was an 8 (?) time Pro-Bowler and 6 or 7 time All-Pro, and he also served as president of the NFL Players Association for little while.
After football he's continued to be somewhat of a friend and ambassador for the LSU program. He applied for the open O-line coaching job a few seasons ago but wasn't hired. He's currently some kind of offensive analyst at Arizona State, and I hope he does well and moves into coaching where he has expressed interest. Don't know what kind of position coach he'd make, but I hope he succeeds in whatever he's doing, out there with the SunDevils or anywhere else he winds up.