Now, for all of my apprehension about Dragon Men as a PC race, I have zero problem using them as monsters.
Half a dozen variations on Dragon Men for use as antagonists...and you will want the Player Races PDF, because it references some of the Edges and Hindrances from there.
They are split pretty evenly among fighter types and arcane types (with one being a priest), with an even split of two extras and a Wild Card for each type.
Probably the most interesting variant is the drakeherd...a flightless dragon man who uses a saddled drake as a mount in order to take flight.
The Sorcerer Lord is particularly scary, boasting an impressive slate of Powers.
These could make for some good, interesting adversaries in the right campaign, although I definitely think the spellcasters are far scarier than the warrior types.