I'm currently gold 5 on two accounts, I generally main mid but can fill any roll except jungle, second best at support. I'm willing to fill in if the person who normally doesn't do that role is temporarily MIA and you are just trying to get games in.
Mid lane champions: Ahri, Ziggs, Talon, Malzahar(sorry no Yasuo, i just suck with him)
Top: Renekton, Quinn, Vladamir, Nasus, Teemo, Ryze
Support: You name it, I got it but probably not the greatest at blitz hooks
ADC: Vayne, Quinn, Cait, Sivir.
Jungle: Amumu, Vi, Xin