Well let's see...having absolutely know idea of your preferences, I will recommend some of my favorites that I think might have a fairly wide appeal...
Right Away, Great Captain
Ray LaMontagne (soulful and wonderful)
The Civil Wars
The Swell Season
Mae (The Everglow is their best album, in my opinion)
Florence and The Machine
The Format (upbeat alternative; fun driving music)
Frightened Rabbit (fantastic indie rock band from Scottland)
Isaac Russell (singer/songwriter; solid lyrics)
I could keep going, but I'll leave it there. I feel like you've either heard of all of these people already or that you will hate them all. But hopefully you find something good in there.