There are a few Youtubers who frequent this site that inspire me but I won't mention them in case it causes embarrassment. But I'm grateful to them for providing a great example!
There are a few Youtubers not connected to my niche who definitely inspire me by their activities and determination to grow their channel. Like Phil de Franco and Casey Neistat mainly. Also in the FIFA niche, KSI and his brother's channel ComedyShortsGamer, and W2S inspired me, not necessarily by who they are as people or their content, but rather how they managed to forge success through this medium.
Reading through some of the replies on this post, it impresses me how little overlap there is between people's responses. It seems there are many, many different YTers enjoying success and inspiring so many newbies.