Fuck, what a loss, he was very talented. Fuck Star Trek, check out something good like Rudderless or especially 5 to 7, probably the greatest love story I've seen in two decades.
It never got traction but sadly now it may with the death of Yelchin.
I'm convinced he was going to be a legendary status actor. He already did some truly amazing work in his tragically short career.
Really the prime definition of an underrated actor considering everyone only recognizes him as Chekov, and probably didn't realize they've seen him in other great films.