Irving spends so much time describing the characters in "The Legend of Sleepy Hollow" that you'd probably recognize them if you passed them on the street. (Can the same be said for your other favorite literary characters?) But looks aren't only skin deep in this story; they actually define who you are. Got green eyes? Then you're probably greedy. Got big muscles? You're a jock. Why not develop the characters further? Well, you already know all you need to know about them.
What you see is what you get with the characters in "Sleepy Hollow."
Ichabod's appearance doesn't really matter. He'd still be the same greedy, gluttonous guy even if he were a stud.