Looks like I was wrong about "Moon" doing a separate list for fullbaclks. That's a shame because not putting Nagurski on the RB list is an egregious omission.
I don't particularly like this list either. I'd prefer to break the LB positons down to best 3 for middle, weakside (RLB) and strongside (LCB).
Using that format rather than lumping them all together I'd go...
Middle - Butkus, Urlacher, Singletary
Weakside - Marshall, Briggs, Larry Morris
Strongside - Otis Wilson, Joe Fortunato (5-time Pro Bowler & 3-time First-Team All-Pro), Doug Buffone
I'm not really sure where Connor fits in as far as linebackers. According to this he only played the linebacker position 3 years two at strongside and one at weakside...
http://www.pro-football-reference.co...C/ConnGe00.htm
dabears54, I'm surprised you'd neglect to mention Fortunato. Are you slipping?
Edit: Looking at the Bears' starting lineups from 1948-1955 (the years Connor played) it confirms he only played LB for three years (as a starter anyway). The body of work is not long enough for me to list him with the others above. He also started at DT one year. He started at LT from 1948-1953. LT is the position he should be discussed as to his place on the all-time depth chart.