Which hero being removed from HotS would make you stop playing?

Bit of a random question here but I was just pondering to myself "If HotS removed a hero from the game that I loved to play, Would I stop playing?".

For me, I love to play Tracer, if they removed Tracer from the game now, I'd have a sad time and may stop playing as much or eventually all together.

Which hero, if removed from HotS would make you consider to stop playing?