Tom Sestak belongs.
There are only six defensive linemen who played in the 1960s, who were all-league selections in three-or-more seasons – Bob Lilly, Merlin Olsen, Gino Marchetti, Deacon Jones, Willie Davis and Tom Sestak. Of the six, Sestak is the only one that is not a member of the Pro Football Hall of Fame.
Career cut short by injuries, but so were Gayle Sayers and Bo Jackson among others.