There's a district tartan for Angus. It looks to be a very nice one as well. Check out the tartan finder on houseoftartan.com to see it. As far as a "generic" tartan, although not a term I would use, Black Watch (AKA government sett) is often considered a universal tartan. Personally, I choose a tartan for what it looks like most of the time. (Although I will admit I really do want to get a kilt in my clan tartan someday.)