Try for something like Sheamus from WWE wrestling. He's a ginger, but not overweight. Though if you go for the facial hair, leave a bit more than he does. For reference, here's a pic of him:
http://worldtenz.net/wp-content/uplo...heamus-wwe.jpg
Honestly, I think facial hair on a dude with hair that color looks awesome. I honestly wish my hair was that color. I also believe that heavy dudes look better with facial hair. But, since we don't have a picture of you, can't really give good opinions on what could possibly look decent on you.