Mumford and Sons
A Day To Remember (Accoustic versions)
Of Monsters and Men
Boyce Avenue
Bon Iver
Birdy
Passenger
Ed Sheeran
Greg Laswell
Radical Face
Daughter
Bastille
Ben Howard
It's hard to really put these guys and girls into specific genre, it's somewhat ballads/indie rock/alternative/mixture of everything. Either way those are Artisits with similar style. There are many more but I'd have to do a proper search-through and recall my memory to name more from the top of my head.