Singed and Brand

Amumu.... Nami.... Sion.... Kindred... Braum... Senna.... Lucian..... Just to name a few. There are plenty of good champions in URF. Just depends on how you use them and what you're up against.

viegar, ashe, taric, yasuo, khazix, malphite, oh wait pretty much anything that costs more than 1 gold

Veigar too, but only if he gets 3starred which isnt very common. Yes, Amumu, Nami, Taric, all those champions are good. But Singed and Brand are the game winners. Either you have a comp including one of them, or you lose 90% of the time. I can have Mystic4, a 2starred Taric, and a Brand starting out will Full mana is still going to 1shot my entire team with no counterplay.