Offense - Doug Reisenberg. "too undersized," "not strong enough," "short arms," but the guy was athletic, a scrapper, and gave you 100% on every single play.
Defense - Greg Jackson. Solid safety and Pro Bowl snub for his entire career... plus, he pretty much single-handedly took Andre Reed outta that '90 Super Bowl because he and Myron Guyton were just fucking killing Reed over the middle.
Honorable mentions go to Chad Bratzke, Rich Seubert, Bob Kratch, and Jeff Hostetler.