Here's a short list of champions I play support with in ranked:
Sion
Sion
Sion
Sion
swapping to: Kayle mid hypercarry attack speed (when practiced I averaged 5.7 / 6 minions a wave)
Maokai
Blitzcrank
Thresh
Pretty much anyone other than Sion if he's banned.
The following supports are mostly for normal queue, but I find ways to make them work:
Heimerdinger
Taric
Mundo
Fiddlesticks
Anivia
Braum
Lux
Katarina (It's hilarious to start 0/6 and finish 5/6, isn't it? Rylai is hilarious with 300 AP)
... and I've played Faker in normals (perhaps this was just incidental, or perhaps I won that much.)
I have a hard-on for committing suicide for saving deceased teammates. Winning scores can be -13 KDA. Especially with Sion.
Reached Gold 1 (while dossed/drophacked every match by some one who really didn't like me winning 25 straight ranked games and getting 25 straight first bloods with ghost + exhaust kayle +41% attack speed) and was in final promo match to Platinum 5.
Currently in Silver 3 due to drophacking during placements. Winning 100% of matches without any drophacking.
I can skype, probably through my cellphone with a bluetooth headset- I'm not installing skype on my PC ever again.
Strengths: MY TANKING IS ALWAYS CRUCIAL TO THE TEAM ENGAGE, saving your ass, pushing to force enemy retreat (position advantage), over 2000 matches played, picking tops as support and causing false counterpicks, teleporting to save turrets, winning with -13 K/D ratio, identifying win the game is won/lost or the tide is turned.
Weaknesses: I don't flash. Teleport is more important than saving a support life that already found a way to farm more than the gold/exp lost, being considered a feeder is worth the win.
Runes I own currently: All mana/18, all hp/18, all armor, all hp %, all crit damage runes, all ap runes, all attack speed runes, all...oh I forget. I own enough.
I own approximately 2/3 champions, maybe 3/4, mostly for trading to players.
Sadly, nobody with a real team has given me a try in years.
I have never bothered to macro, but I did just ping a game winning shot call today. And 2 other times this week that I can remember.
If you're curious, add SirFolditAlot. I'm probably forgetting a few supports I play, but these are the ones that work best.
I'm in the east coast, so at the moment, and I work at 7:30 AM, but I can play until 12:30 AM... so I could in theory try out as a surprise alternate.