Jesus Christ, don't go with a more formal style. Have you morons even looked at David lately? He's rugged looking, masculine, imposing, hairy, and does not belong anywhere near fucking Gucci anything.
This is the more formal sort of attire you will ever need to be wearing:
And even that may be pushing it a bit. First things first, avoid overly graphic clothing. You're a grown man so this shouldn't be too much of a problem, but if it needs to be said, no elaborate designs. Solid colors are preferable.
I would honestly advise you to start lifting weights and pack on some muscle (or maybe you already do, I'm not very familiar with your physique) and then invest in some simple, inexpensive sleeveless muscle shirts. Loose fitting jeans. For colder weather, sweaters, but I'd avoid v-necks (again because you're very masculine looking. Girly motherfuckers like myself can pull off v-necks, but you could not).
Oh, and I bet you'd look awesome in one of these: