I love supporting a MF with Leona. Her ult do a lot of damage with my stuns and my passive. She works pretty well with Taric too.

I play Maokai support with any Vayne. Seriously broken.

AD Sona maxing heal with Mundo bot turning heals into cleavers and BA. AD red/quints, mregen/lvl blues/yellers. Split minions. Mundo with armor runes/health regen quints and defensive masteries for tanking blitz bursts.

Start mundo with dorans and Sona with a health xtl, Build ruby sightstone on Sona when you get the gold, followed by your dps stuffs. Couple warmogs on Mundo. Heal for days. Just keep pushing bottom, watching and disengaging when multiple come to stop you...push again...you will win eventually if your other lanes aren't horrible because you will keep 3+ opponents tied up against you since you are tank + dps bottom and not just support + dps. Will hit a point where you just run over support + dps.

Also can dragon away whenever.

Blitzcrank works really well with vayne, but then again he works with anyone as long as you are good with the grab.