New bands like the ones you listed? That's a pretty broad range, so I'll just list a few modern(ish) bands here that you may or may not already know of, but that I really enjoy personally.
Robert Randolph freaking slays the steel pedal guitar
Moon Taxi can sometimes get a little on the poppy side but sometimes they bring the funk and sometimes they bring the old school sound, and I've been really diggin them lately. Also, they have an awesome name.
Gov't Mule
Umphreys McGee
Probably my favorite Beatles cover ever:
Moe.
Dangermuffin (another band with a great name). Kinda poppy again, but I love their lyrics.
Galactic
Tea Leaf Green (goddamn these guys put on a fun live show)
Aight, that should keep you entertained for a while. There's plenty more where that comes from. Hopefullly those embeds work.