What Lords are wildly different than their factions?

I just played a campaign as the SLAYER KING and had such an unbelievable blast. I played him back in WH2 and was terribly underwhelmed by slayers being limited to a single unit and their armor piercing variant. But with the pirates, doom seekers and new slayer artillery in WH3 it made for a very fun campaign. What stood out to me was how different it was from the standard dwarf armor and shooting lines. Battles with SLAYER KING Ungrim are so fast and frantic, if the enemy manages to survive the onslaught for more than five minutes I have to take stock of which slayers aren't totally wrecked and can keep up the fight. SLAYER KING Ungrim is so vastly different from other slayers as well because he's so heavily armored.

I'm looking to start a new campaign after work today and wanted to know what other lords bring a totally fresh experience to their faction?