Which race would you add to Heroes?

I think there's a lack of High Elves. An expansion could be built around the emergence of this race. For example, one of the leaders of the Sylvan elves, let's say a ranger who constantly attacks the Dungeon elves, suddenly comes to his senses and realizes that the druids are crazy old men, and he's sick of the trees. He decides to separate from them and, during another raid by the Dungeon elves, he destroys them and takes revenge in the Dungeon, and then all races participate. Level 4 could be Pegasus riders. Level 1 could be War Elves, and it would also be good to add Witchers.