I'm going to stick to recent years just for the sake of skipping the easy ones - I miss Eric Berry, Jauan Jennings, Denarius Moore, Jerod Mayo, Omar Gaither, Kevin Burnett, Derek Barnett, James Wilhoit, Donte Stallworth, Josh Dobbs, Erik Ainge, Justin Harrell, Kevin Burnett, Casey Clausen, Jason Witten, Travis Stephens, and for my special pick, Troy Fleming, who I feel could have done a lot more in a different offensive scheme.
Really miss Donte Stallworth. One of the best all around wideouts I've ever seen live in Neyland. Lot of greats, don't get me wrong, but Donte could catch anything anywhere any time. Just fun to watch that guy play.
Eric Berry was something else though. You could just feel opposing offenses avoiding him - it was the damndest thing. I've seen that effect in a lot of games at times, but with Berry it was like a palpable, constant fear. Offenses didn't want to go anywhere near #14. I'm exaggerating of course, but ... not really.