Every time people lament changes to the lore that amount to "not every member of species X is irredeemably evil" and claim the game is removing villains from it, I think how villains of so-caleld evil species fall into two cathegories: a) bland and boring and b)have something else, unrelated to their species going on for them, that makes them interesting.
Can confirm, I run a LOT of dragons and the interesting dragon villains are generally about finding unique takes on their common traits or villains because of their response to their circumstances rather than pure random villainy. We've got the red dragon who self-perpetuates her own cycle of violence, we've got the black dragon who's mentally broken because their worldview of being entitled to everything due to their strength collapsed after they lost a territorial struggle, we've got the emerald dragon who's desire not to be bothered by their humanoid allies led them to neglect their promises, we've got the silver dragon who loved her friends so much she was willing to fall into necromancy to try and undo their deaths.
Also we have That Bastard With Eight Player Kills.
That said, always remember: To become cliche, something needs to work super well first- so well that everyone does it. It only crosses from great into cliche if everyone does it and forgets why and how it worked in the first place.
I’m known for running mostly human campaigns, but one of my favorite tricks is to run a seemingly human villain with personality traits usually associated with an evil monster, then as the adventure goes on the learn that the heraldry features the monster etc etc.
Of course they know me, so they all think it’s metaphor and inspiration.
But at the very last minute, when they think they have him cornered and taken care of all the lackeys…. SURPRISE MOTHERFUCKERS! He drops his magical disguise and it’s an old fashioned D&D lair boss battle!!!!!!!