I'd have to agree that anger isn't usually it's own emotion, it's a specific expression of fear or sadness. There are always exceptions I think, but usually there's more to it.
My favorite thing is to express those things through humor. It's not for everybody. If you're not funny enough you can just sound like an idiot or an asshole, as I can. Other times it enables you to attack the root of the problem in a digestible way that doesn't make a person feel attacked.
Robin Williams had a degenerative neurological disorder and didn't want to live through the decline. Common misconception as media speculation was "funny man sad" long before the family shared any details.