In the movie, “Hotel Rwanda,” Paul, the manager of a five-star hotel in the capital city, goes to buy supplies from George, a Hutus businessman of some wealth and influence.
That is how I would write this. Does Hutu have an s on it?
If you want to leave in the "who is," it's not wrong, but it does need the comma. Note that you also need commas to set off the description of Paul, and that five-star requries the hyphen.
(I would use "who is" not "who as" since you are writing in the present tense.)