Stark is the obvious choice. They're pretty much the least dickish of the bunch, other than the Martells. The Targaryens were also awesome, when their crazy inbred leaders weren't, you know, roasting people alive for teh lulz.
Also the Night's Watch for being generally the baddest dudes around. I'd join up if it weren't for the hellish conditions, and the whole "no marriage" deal.