You could certainly argue Schilling belongs, but Carton was much better.
Carlton W 329- L 244, 3.22 ERA, 4136 Ks
Schilling W 216- L 146, 3.46 ERA, 3116 Ks
Carlton exceeds average HOFer stats, Schilling about average HOFer for a pitcher.
IIRC, Schilling played on much worse teams. And Schilling was the better pitcher in the playoffs.
Carlton: 6-6. 3.26 ERA, 1.480 WHIP, 84Ks, 36 BBs, in 99.1 IP. In his 4 trips to the WS he was 2-2, 2.56 ERA, 1.389 WHIP
Schilling: 11-2, 2.23 ERA, 0.968 WHIP, 120Ks, 25BBs in 133 IP. In the four times his teams made the WS (7 starts), he was 4-1, 2.06 ERA, 0.896 WHIP.
That's Bumgarner-level (14 GS, 8–3, 2.11 ERA, 102 IP, 18 BB, 87 SO)