none of my suggestions are exactly close, but things you might like maybe...less mainstreamish, and somewhat 90s oriented
I feel like you might like Radiohead, try -All I Need and Jigsaw Falling Into Place
I've been listening to PJ Harvey a lot, try -Rid of Me, Man Size, and Good Fortune
well if you like Gorillaz you might like Blur (same vocals), I'm not sure what songs actually, maybe Beetlebum
I think you should try Bon Iver, Perth, just because...kind of similar to Jason Mraz in the higher vocal range aspect I guess, Priscilla Ahn is kind of similar to a female version of Jason Mraz maybe
some The Smashing Pumpkins, I like Mayonaise, Spaceboy, 1979, I seem them as fairly important to the 90s sound
Elliot Smith, Angeles maybe..Needle in the Hay, then The Microphones- I Felt Your Shape
Modest Mouse, I really don't know them that well, my favorite song by them is Dramamine
Sunny Day Real Estate- Seven
none of the music you mentioned is really that similar...just give them a try