Varian is a bit tricky since he's got three different stances (actually he has four, but nobody's going to miss that one since it's identical to the Sword and Board stance, just without the shield) which makes it a hassle to clean up, but it is doable. The thing that helps a lot is a lot of his animations are actually the same, just with a different weapon equipped.
Anduin I haven't looked at at all, but I don't expect him to be difficult (unless I can't get his animations right like with Mei). My intention is to at least try to get his Starcraft skin (aka Valerian Mengsk) done.