Is 'roundish' a better word? She's certainly more fleshy than I am (I'm not underweight, I just exercise a lot and look much more sinewy), or any Disney princess for that matter.
Whilst being indeed parody of the stereotypes, one of the original ideas for these elves derives itself from the Finnish mythology, where elves can take many a shape from beautiful forest elves (metsänhaltijat) to something much more mischievous, unpleasant-looking, and hairy (f. ex. hiisi). Or they may work as small hidden guardians of the house (kotitonttu, 'house-elf') and other property. This is indeed where the whole house-elf concept in Potter derives itself from; Rowling must've read Finnish folklore somewhere.
While Khran and his kin are ugly, they retain many of the 'standard' elvish features. They live for tens of thousands of years, wield magic, etc.
Haven't read Elfquest, though. American comics are a bit hard to come by here.
Yup, Snape is zillions of times more interesting a character to be paired with Tonks than Lupin.
Oh well.