Trying to come up with one that would work. And it's based on who we play right now.
Urgot and Alistar.
Urgot is a decent AD ranged carry. He can grab enemies and pull them into danger. Alistar can keep them there. Urgot can escape back to safety with his shield and/or flash. Boots of tenacity would be needed to avoid the enemy slow/stuns.
Singed and Fiddle:
We've played with this a lot, but have never mastered it. Singed flips, Fiddle fears and starts life stealing. But Singed doesn't have enough damage burst to kill the enemy. And Fiddle isn't a carry. So when would he be laning with anyone? Only on TT.
Fiddle and anyone:
Limited to TT because he doesn't lane with anyone on SR.
Ashe and Alistar:
We can't pull the enemy anywhere. But, an Ice arrow. Alistar head butting (or whatever he does) the enemy where we want them. Then doing the bounce enemy ability will keep that person in Ashe's arrows for a painful amount of time. I liked that team up on TT. Leisher just needs to keep practicing Alistar.