Which ones? A champion with long range, good poke, good damage, and good escape, which fulfills Li-Ming's description, but what would be the LoL equivalent?
I was thinking Ezreal, but Ezreal is an ADC whereas Li-Ming is a mage.
Ahri or Leblanc IMO. Though Heroes in HoTS are allowed to get away with things that wouldn't work in league so it's hard to compare sometimes.
Sounds like a mix of Katarina and Vel'Koz, but I haven't played HotS so I could be totally wrong.
Well, I mean, 
basically has Li-Ming's passive and vice versa
Passive resets remind me of Katarina
Her Q is Heimerdinger 
Her W is Aurelion 
Her E is Ezreal 
Her first R is Vel'koz 
Her second R is Gragas 
Somehow she also reminds me of Syndra 
Hope that helps.
P.S. Sorry if I got QWER wrong, I dont play Hots and had to watch her spotlight
I looked her up quick. She has some decent similarities to Ahri and as you mentioned, Ezreal. From what i saw her q and w are pretty similar but in fliped slots
