Mid Lane champions

Hey guys , im a new lol player and i play mid my champion pool consists of and lastly who i bought on sale Just wanted to have a discussion on what you high elo mid laners play and who you think the best is .I think the best mid laner is azir - very strong laning ,high damage,great teamfighter ,ive read alot hes difficult to play i dont dispute this but where i am atm ( unranked ) people dont know how to play against him and they dont play him every game is either so he hasnt seamed too difficult to play

But anyway yeah ,who you think the best mid laners are and your personal mid lane pool ps. Thinking of next buy :