Programming languages that don't suck

Lisp, Scheme and Haskell are the obvious ones. JavaScript is a nice language. C always has its place. C# might be the jewel of enterprise.

What else is there that /prog/ recommends? I've heard good things about ML. A language that seems interesting from its Wikipedia page is Self, but I'm not too sure about it.

Erlang
Yeah, the language where if- and else-blocks both have types, and they both need to return the same type. What the fuck Erlang.