Hmm, I could respond but it would be rather long
Ah, what the heck!
for Beck, try
Russell Simins
Cripples
Liz Phair
Gnarls Barkley
Beat Happening
Silver Jews
Dub Narcotic Sound System
Bob Dylan
The Rolling Stones
Eric Andersen
Ian Hunter
The Beatles
Paul Simon
Joe Hill
Freedy Johnston
Leonard Cohen
Bill Fay
Kris Kristofferson
Tom Waits
Chris Rea
Tim Hardin
Jackson Browne
A.A. Bondy
Peter Gabriel
Todd Rundgren
Roxy Music
Brian Eno
Chris Rea
Playing for Change
Phil Collins
Adrian Belew
Neil Young
Bruce Springsteen
Ian Hunter
Emmylou Harris
Eric Clapton
Judee Sill
Nicolette Larson
Elliott Smith
Pavement
Archer Prewitt
Joy
American Music Club
Yo La Tengo
Seldom
Iron & Wine
Wilco (one of my favorites!)
Decibully
The Bigger Lovers
NoahJohn
The Damnwells
Backyard Tire Fire
Matt Mays
Salim Nourallah
This should be more than enough I would think. Obviously you probably wouldn't like all the artists on there, those are just the artists that IMO sound most like what you listed, based on my limited music listening.