There are lots of actors and actresses out there who barely get nods for their talent, or they’re not leading men and women, so they don’t get the paparazzi chasing after them and are rarely mentioned.
I’ll name a few whom I like:
Albert Brooks (fantastic in Finding Nemo and Broadcast News, but always very good)
Marcia Gay Harden (brilliant in Pollock and Mona Lisa Smile)
Joan Cusack (her brother gets the accolades, but she’s damn good too)
Steve Buscemi (one of my all time faves–due to appear in Sopranos Season 5!)
along the same lines:
Philip Seymour Hoffman (but he’s getting the bigger parts nowadays, still not a leading man type, but a far better actor than Ben’s Afflict or Keanu could ever hope to become)