Gianni is a really famous voice actor and voiced characters like gabriel (ultrakill), sebastian (roblox : pressure) and vertex (anthro heat vr) which is a furry porn game so thats why I said that.
But yeah gianni being good and famous he's really expensive, but at least you can pay him to insult you with gabriel's voice for a whole hour, worth it.
Edit : i think you can check out his work, its probably not worth your time nor his if you try to get him, but at least seeing what he can do, I think his best work is gabriel ultrakill, but the one you would be most interested in is vertex. But imma be honest if you can get him to voice any character I might even [redacted] (joke ofc)