The word «iconic» is so overused it makes me wince when I see it, but in the world of Warhammer it can be fairly applied to two characters: Gotrek and Felix, who sum up the duality of the setting.
Gotrek, a dwarf trollslayer with a mohawk who longs for a heroic death to erase a failure so shameful he never speaks of it, is Warhammer at its most heavy metal album cover.
Felix, a poet sworn to record Gotrek's saga but terrified he'll be the one to die first, is Warhammer at its most Blackadder.
The two can be recruited in Total War: Warhammer 3 (Gotrek voiced by the perfectly cast Brian Blessed) if you win their quest battle, racing to the rescue to keep them alive when they're about to be overwhelmed by the daemonic hordes of Slaanesh.
This is fairly achievable if you're fielding an army with some heavy cavalry who can charge into the middle of the battlefield in time to make a difference, but if you're playing poor stunty dwarfs—who thematically speaking, are one of the armies most likely to recruit the duo—you're kind of boned.