Comedians have their strengths. Some are good with “paper” — prepared written material. Some are expert improvisers. Some create indelible characters. And a few, the rare ones, can do it all. Matt McCarthy, a longtime New York comic currently destroying Los Angeles, has got the magic. We’ve seen him in several realms, including bar-raising sets at Troy Conrad’s comedy-improv shows “Prompter” and “Set List,” and he’s amazed and delighted in every setting. You might have seen him in TV commercials or heard him on his wrestling podcast — he was a writer for the WWE before joining The Pete Holmes Show staff. But when you experience McCarthy live, you’ll understand why both audiences and fellow comics consider him a unique sensation.