That is the beauty or the ES you can be whoever you wish, muffle is very good on heavy armor if you want to delve deeper into illusion get the invisibility spell as it farther helps those sneaky types.

Khajiit
Heavy Armor
Archery (main), Unarmed (secondary)

And get the Gauntlets/Perk for Unarmed. You can tag 'em from a distance, then hack away at their face with your kitty paws of destruction!!! -.O

Actually works quite well surprisingly.. and that char. is only LV10ish..