You haven't metioned Mrs Coach in any of your FNL posts SpeedingUptoStop. EPIC FAIL!
I agree. I'd also say it of the female cast. Connie Britton, Aimee Teagarden, Adrianne Palicki. All fantastic performances and characters. Then there are excellent minor characters like Smash's and Tyra's mother. The only weak link is Minka Kelly and she actually improved a lot over the course of the show, i think.
Also there is no way Tyra's season 1 arc is filler. No way and no how. Her arc throughout all 3 seasons (aside from the season 2 detour into soapland :/) fits perfectly within the "devil town" theme the show is based around.