I like the horns on E, although if you're after a goat aesthetic, the slightly curving single-part horns (G perhaps) would look nice. So the E horns that has prongs is nice too, but doesn't remind me of a goat.
There's a lot of variation in the outfits and colours. Does he wear all of them or are you still looking which way to go with the outfits?
I'm digging the orange/white/blue palette a lot. If you'd like to keep his hair white, you could try using orange as a secondary/effect colour, for example in his clothing.