You are asking two different questions here. Taric is the most well-rounded and probably the strongest laner. The one that contributes the most to the team... tough choice, but Lulu, Janna, Alistar, and Leona are strong contenders.
From: BreezyExcursion | #008 Ashe. Long range for poke, slows for days, stun initiate, free vision, and decent damage, especially once you get Zekes. Then you and your AD carry tear apart the other team.
Sounds quite fun.
Id try it but i dont want people to think im trolling.