I know Ron Wolf is highly revered, however, the teams he GM'd only won a single Superbowl (1996) and made it to one other and lost (1997).
Not saying he doesn't maybe deserve it someday but I am also of the mind the Gil Brandt is more worthy.
Wolf had a strong hand in building the Raider teams of the 60's and 70's (and contributed to them in the 1980's as well), and built the Buccaneers from an expansion team to one that made the NFC Championship Game in their fourth season of existence (after going winless for nearly two years). Wolf's achievements are definitely Hall of Fame worthy.
Brandt definitely made his mark, especially with scouting smaller schools and converting players from other sports to being highly effective football players (Cornell Green and Pete Gent, amongst others). The computerization of scouting information was largely a Tex Schramm innovation, not Brandt's. Brandt's effectiveness drafting also took a dramatic swing in the wrong direction once the draft moved from January to first May, then April starting in 1978. Between 1978 and 1988, you would be hard pressed to find a team that drafted worse than the Cowboys did. I would think that this had an impact on how Brandt is viewed by his contemporaries.
I do believe that Brandt should be in the Hall of Fame, especially in light of his contributions to NFL Media and Sirius XM in addition to his work in Dallas, but the last 10+ years in Dallas definitely opens up his credentials to some scrutiny.