Taron Egerton has been on fire of late. Ever since Kingsman has been a hit, he has been in Kingsman 2, Sing, as well as having a big Robin Hood reboot, and Kingsman 3 on the way.
He also will play Elton John, in the upcoming RocketMan. This is not a biopic per say, as it is a fantasy retelling of some of the pivotal points in Sir Elton's life.
The thing that impressed me was that Egerton is doing his sown singing, including the version of "Rocketman" in the trailer.