may i recommend these mid laners.
lissandra, really strong teamfighter, agomst the best in the game, she clicks R something dies, late game her Q will be throwing out 700 damage on a 1.8 second cooldown, plus tons of cc and utility.
fizz, for obvious reasons, you can feed in lane but still get fed, this guy is the vayne of apc's.
ahri, i see you already play her, shes really good, but not nearly as bursty as fizz, even with true damage, you NEED to land her charm and get snowballing early to make a big impact, shes not ahri 2 seasons ago, but if you can get fed and roam well you can carry games.
viktor, i loved old viktor and new viktor is amazing, really strong teamfighter, beats most mid laners.
leblanc, if you take the time to learn her, she dominates solo q games by herself, and hard counters annoying skillshot reliant champions such as ziggs.
heimerdinger, very strong pick but huge skill cap, if you can land your skillshots you dominate your lane and the game, he has his share of hard counters though, but his ult turret and gernades win teamfights.
wukong, really strong mid laner atm that nobody seems to realize.
hes also considered a counter to zed.