If you look at advanced metrics, Schilling, Mussina and Walker are all obviously worth inductees. Kent somewhat, McGriff not so much.
Schiling actually has the best strikeout to walk ratio since 1900. If that's not a Hall of Famer, I don't know what it is.
Mike Mussina is 24th in career WAR among Pitchers (Schilling is 26th). Every person ahead of him that didn't take steroids is a Hall of Famer (in other words, Clemens is the only non Cooperstown member ahead of him in career value). Also, you don't have to be the best pitcher of your Era, but clearly one of the best. Mussina was in fact that when you look beyond the most basic (and flawed) of metrics.
Mussina and Schilling both amassed more career value than Tom Glavine (28th) and John Smoltz (39th).
Larry Walker is 86th among batters in Career WAR. That's in spite of his career not having been super long due to being very injury prone (and yes, that's with park adjustments - he's was great even without Coors Field).
McGriff is only 260th...the only deserving Hall of Famers in that range are catchers and shortstops with great career peaks, not first basemen. Most of the Hall of Famers in that range are among the biggest mistakes of all inductees.
Jeff Kent is 228th but played at Second Base...very borderline.
Nomar had one of the best shortstop peaks in baseball history and overall has a Top 20 case in terms of shortstops, but there's definitely not enough meat there overall to warrant induction, obviously.
Comparisons By Average JAWS Score For Position:
* JAWS is a combination of career value and 7 year peak value.
Mike Piazza - 51.2 (5th, Average C inductee is 43.1 - 13 HOFers at position)
Jeff Bagwell - 63.9 (6th, Average 1B inductee is 54.2 - 19 HOFers at position)
Fred McGriff - 44.1 (28th, Average 1B inductee is 54.2 - 19 HOFers at position)
Jeff Kent - 45.4 (19th, Average 2B inductee is 57.0 - 19 HOFers at position)
Alan Trammell - 57.5 (11th, Average SS inductee is 54.7 - 21 HOFers at position)
Nomar Garciaparra - 43.6 (24th, Average SS inductee is 54.7 - 21 HOFers at position)
Edgar Martinez - 56.0 (11th, Average 3B inductee is 55.0 - 13 HOFers at position) *Played primarily as a DH
Tim Raines - 55.6 (8th, Average LF inductee is 53.3 - 19 HOFers at position)
Larry Walker - 58.6 (10th, Average RF inductee is 58.1 - 24 HOFers at position)
Curt Schilling - 64.5 (27th, Average SP inductee is 61.8 - 59 HOFers at position)
Mike Mussina - 63.8 (28th, Average SP inductee is 61.8 - 59 HOFers at position)
Lee Smith - 25.4 (15th, Average RP inductee is 34.4 - 5 HOFers at position)
Clearly Worthy: Piazza, Bagwell, Trammell, Martinez, Raines, Walker, Schilling, Mussina