I'll add to the list with Xaelvaen, my Valenar (Valaes Tairn) Ranger. Started as a fairly simple double-scimitar wielding Elf that just really hated halflings. I don't remember what alignment to be honest, I just know it had Chaotic... something in it, probably Chaotic Good with Neutral Tendencies. He wasn't quite evil (except when it came to Halflings), but he also wasn't willing to throw himself into harm's way for nothing - afterall, the entire country is a country of mercenaries.
I remember at one point after an adventure had concluded, we returned to Sharn for some downtime. No one in the group had leveled, but due to some good roleplaying rewards I was 4 xp away from a level. So, while on my way to the market, the DM decides to test my alignment, and I spot a few halflings walking on a bridge a bit below me - and of course, to really test me, they were Talenta halflings in Sharn for their first visit, or so I could assume.
I leaped the 30ft down to them (rolling tumble to not die accordingly), and slaughtered the small group of them by shoving them off the bridge one at a time - except the last one, who I would play a game with. A game my character invented which was to see just how far the stream of blood from your enemies would splatter away from the corpse. Double-scimitars were excellent at this game.
Of course, the Sharn Watch were after me, at least in theory - there weren't eye-witnesses, but we heard reports they were looking for a 'brutal and ruthless murderer'. I mean, Valenar warred with the Talenta relentlessly, he just couldn't let it go.
Regardless, despite the RP aspects placed into the situation by my DM, Xaelvaen forever became known as the character who killed random halflings for 4 xp... so he could level.