Going off pro performance.
At DT, we have two HOFers (Sapp and Kennedy), plus Brown, who was better than both and would have gotten there, Wilfork, Maryland (No. 1 overall), Burt, Dunn, etc.
At S, we have Reed (HOFer for sure), plus ST (who would have gotten there), plus Blades, plus D. Williams, Marion, KP, Meriweather, Owens et al.
At QB, we have Kelly (HOF), Testaverde and Toretta (Heisman), Walsh, Dorsey (top 2 Heisman), Kosar, Erickson....
At WR, we have Irvin (HOF), Wayne (may get there), AJ, Moss, Hill, E. Brown et al.
At DE, you have Hendricks (HOF, GOAT CFB DE), Edwards, Medearis, ***an, Stubbs, Holmes, Lang, Patrick, Campbell,
At LB, you have the GOAT (Lewis), plus a lot of very very good guys, but there isn't that second other guy like you have at some other spots. Armstead may have had the best pro career other than Lewis.
Gotta be QB or DT, IMO. Close call at DE, S.