DraQ
Arcane
There've been a few that either definitely weren't RPGs or shouldn't be counted as such like The I of The Dragon* or Dragon Commander.Games where you can be a dragon? no
In Drakan at least you can ride one.
*) IoTD as a whole was quite meh, but it had cool dragons, destructible environment and spell effects. You could play as one of 3 dragons - a blue ice dragon focused on speed and frequent, versatile spellcasting, a red fiery dragon that mostly hit stuff hard with breath weapons but could also augment his natural weapons with infrequently cast (game featured cooldown system) WMD grade spells and acid breathing black dragon with tank-like durability and knack for necromancy.
It did have stats and level ups (and a cool feature - dragons subtly grew and developed visually as they leveled up) but I wouldn't call it an RPG.