I would have to say shigeru miyamoto the man and his characters were instrumental to most of my childhood and early teenage years. I have countless amazing memories with several of his titles and i am a massive mario fan to this day , to me Shigeru miyamoto is everything i aspire to be or produce as a game developer .
I also have to say my appreciation for peter molyneux comes and goes i was heartbroken in my teens when " project ego" managed to only be fable 1 but as i've gotten older, learned more about game development and my perspective on the series changes I feel like everytime i go back to fable the game seems just a bit more complete than it was last time. while by no means perfect i think it includes enough subsystems that makes the world one interesting cohesive universe but isn't quite as deep in terms of lore or things as skyrim or the witcher . It's weird but i appreciate peter molyneux some days and i loathe him others haha but i think about him enough that i can definitely say the titles he has worked on and spearheaded have impacted me substantially .
lLastly I would have to say the team at " The Behemoth" their games are so raw and so founded on the basis of being fun and addictive first and then wrapped in their own unique style that i can't help but imagine it has to be incredible to work on that team. sometimes it just seems like the fun they had in development oozes out of the monitor / tv. screen and i absorb it hungrily.