I roleplay Glee on here, tumblr and I also have a Facebook rp. I've tried roleplaying it on LJ in the past but I didn't really fit in with the group.
That said, I usually play Kurt and I'm not interested if I'm not getting Kinn which is why...I usually make my own or stick to 1 x 1's XD. And y'know, if anyone is interested in playing Finn for me then I'd be very happy.
I've also just made a Glee AU rp with a similar idea to the show Once Upon A Time so if anyone is interested in anything different,
it's here.
But yeah, it's difficult to find characters like Mercedes and Tina but I was also surprised when I struggled to find a Sam for one of my old rp's on here. He's generally a popular character but apparently not.
But, Glee rp's are always fun to do, providing you get along with people.