Alex created Gravity Falls and voices almost all the characters and is currently writing Detective Pikachu!!
I vote for him to come to one of the shows
http://www.imdb.com/name/nm3229215/
Justin roiland! he has done voices in adventure time and fish hooks and gravity falls and created rick and morty and even voices rick and morty! lots of bang for your buck!
Rick and Morty has easily become one of the top animation tv shows across the world so why don't we ever get anyone from it?!
I suggest getting Dan Harmon and Justin Roiland!! wubba lubaa dub dub!