There have always been fringe combo decks in Legacy that were always a card or two away from being able to hang with the big dogs. Of course, there are still countless iterations of those various decks to be worked on and different ways to splice one deck into another.
Today we have a Painter's Servant + Grindstone deck that also features Tezzeret, Agent of Bolas as a backup win condition and draw engine. The Painter's Servant combo is typically awesome unless you run up against a bunch of removal or someone playing Emrakul, the Aeons Torn. With Tezzeret, you can even side out the combo completely if you want to.
One of the cool things about Painter's Servant is that it allows you to play the various elemental blasts, such as Hydroblast, in your maindeck. With a Painter's Servant in play, you can counter any spell or destroy any permanent with a simple Hydroblast, which adds a welcome dimension to any deck.