Reaper Miniatures (http://www.reapermini.com/) produces a massive collection of high quality fantasy and science fiction miniatures. If you are an ‘old school’ RPG fan, like myself, you will find wide range iconic ‘old school’ monsters that could populate your dungeons and battle your players.
I recently had the opportunity to paint some iconic monsters from Reaper Miniatures.
Bugbears Dark Heaven Legends 02469: Bugbear Warriors
and 02515: Krunkh, Bugbear Chief
Gnolls Dark Heaven Legends 02467: Gnoll Marauders
and 02592: Gnarr, Gnoll Champion
Bugbear Attacks Adventures (03746: Ava Justinia,
Female Templar and 03148: Jerach, Undead Hunter)