Try this Discord, Lots of League players there! They also host free RP tournaments.

Escape E-Sport Communities is looking for more players to join their ranks. Our Community only focuses on the most popular E-Sport Video Games. We now host Special Events and Tournaments the average player wouldn't normally have access to. The Tournaments and Special Events are free! This means free Riot points, V-bucks and Steam dollars to our winners and sometimes just for competing. To find out more about Escape CLICK or COPY https://discord.gg/azx3k5t and connect with our discord. We also have a great website http://www.escesportcommunities.com/ & reddit http://www.reddit.com/r/EscapeEsports/ we would love for you to check it out to learn more about us.