Regarding being the 3rd best pitcher on his team:
1991: Glavine 7.4, Smoltz 4.7, Avery 4.5
1992: Smoltz 3.7, Glavine 3.5, Avery 2.5
1993: Maddux 6.2 WAR, Avery 3.0, Glavine 3.8, Smoltz 2.8
1994: Maddux 7.8 WAR, Glavine 2.0, Mercker 1.8
1995: Maddux 8.8, Glavine 4.7, Smoltz 4.4
1996: Maddux 6.3, Smoltz 6.1 Glavine 5.4
1997: Maddux 7.3, Glavine 5.0, Smoltz 4.5, Neagle 4.1
1998: Maddux 6.1, Glavine 5.6, Smoltz 3.2
1999: Smoltz 4.4, Maddux 2.9, Glavine 2.8
2000: Maddux 6.1, Glavine 4.5, Millwood 1.5
2001: Maddux 4.5, Burkett 4.2, Glavine 3.3
2002: Maddux 4.1, Glavine 3.7, Millwood 3.5
I don't think this necessarily hurts Glavine's argument. Finishing 2nd to one of the 5 best pitchers of all time doesn't make you a bad pitcher. And consistently being in the top 3 on the best pitching dynasty in history can only help your argument.
I'm coming around to the idea that Glavine belongs in the Hall. I think I was too harsh on him before I really looked at the numbers. He's not one of the 10-15 best pitchers of all time but I think he might even be in the top half of HoF pitchers.