Really enjoy repansel in the current meta, not too difficult and alot of faction potential late game. Also since SFO3 didn't bring back her banner form I find putting her on foot with your infantry lines pretty satisfying. Fun watching cute little repansel chase down and body slam lords and heroes with 1100 base weapon strength. Goes up to like 1500+ with her unique sword ability.

Also because her unique skill line affects generic infantry and units, combined with bret blessing, you can get pretty potent saurus from tiktaq or longbeards from dwarves(best ones if you're using army caps :D.)

the mannfraid von carstein campaign was very cool(very difficult settings)