Mingus is always good: https://www.youtube.com/watch?v=sxz9eZ1Aons&list=PLEA3564EE069BE54C

The Flecktones are different, but I would say they're still jazz: http://www.youtube.com/watch?v=q50xzhDO9lI

sun ra. ill warn you, its a little experimental. you either love it or you hate it.

Personal Favs:

https://www.youtube.com/watch?v=HfVmSOlw4WA <-- one of my favorites
https://www.youtube.com/watch?v=eMDCdSv11no Very Upbeat
http://www.youtube.com/watch?v=VKXsnDvILmI
http://www.youtube.com/watch?v=7n61CVmRcGw
http://www.youtube.com/watch?v=jB5QVfiRdPE
http://www.youtube.com/watch?v=GQwhHdXGFwA

SINGERS:
http://www.youtube.com/watch?v=HauOcqSFjnE
http://www.youtube.com/watch?v=yJ-9IBZaydQ
http://www.youtube.com/watch?v=PbL9vr4Q2LU

Others I recommend:

Bebop/Cool/Modal/modern, etc etc:
Charlie Parker
Charles Mingus
Miles Davis
MJQ
Barry Harris
Tommy Flanagan
Charlie Rouse
Sonny Stitt
Sonny Rollins
Wynton Marsalis
Dave Brubeck
John Coltrane
Wardell Gray
Lester Young
Lee Konitz
Lucky Thompson
Bud Powell
Joe Pass
Ella Fitzgerald
Sarah Vaughan
Keith Jarrett
Art Blakey and the Jazz Messangers
Art Tatum
Art Pepper
Paul Chambers
Oscar Peterson
Yusef Lateef
Chet Baker
Coleman Hawkins
Paul Desmond
Gerry Mulligan
Dexter Gordon
Thelonious Monk
Hank Jones

Swing/Bigband (the happy music!)
Benny Goodman
Count Basie
Buddy Rich
Glenn Miller
Artie Shaw
Louis Armstrong
Daniel Kaye
Jimmy Dorsey/Tommy Dorsey
Nat King Cole
Duke Ellington

EDIT: Sorry for my huge post, I love jazz a lot hahaha.

http://www.youtube.com/watch?v=KO_Qdv3e868

The delayed hits at ~3.20 are just hnnnnnng

Can't get enough o' dat Hammond B3 sound.

http://www.youtube.com/watch?NR=1&v=0FP4fDH3mVU&feature=fvwp

https://www.youtube.com/watch?v=XyC0xAboaR4&feature=related

http://www.youtube.com/watch?v=FPdPK_rIseY

I really liked the Bad Plus - Seven Minute Mind that Rooks posted!
BBNG is pretty awesome
http://www.youtube.com/watch?v=2KAiszHdGH8

Medeski Martin and Wood

https://www.youtube.com/watch?v=OuCXJlfeq7I
https://www.youtube.com/watch?v=-3iyMC5nhfw

My Favorite Things: http://www.youtube.com/watch?v=qWG2dsXV5HI

Confirmation: http://www.youtube.com/watch?v=zV6y1f7CU-A (you need to actually see this video)

Fly Me To the Moon (Oscar Peterson): http://www.youtube.com/watch?v=tDvRWWsL39k

Equinox: http://www.youtube.com/watch?v=ZfDoAofL_hw

Groovin' Hard: http://www.youtube.com/watch?v=g68k-ehA6x8

just to name a few

http://www.youtube.com/watch?v=vLg0Kq8TVXo

Mike Prigodich is great as well.

I have a jazz radio show during the semester, so I dig the thread.

http://www.youtube.com/watch?v=VhkWrWMEY7c

Indigo Jam Unit :)

What vanilla said repeatedly, Miles Davis.

http://www.last.fm/listen/artist/Miles%2BDavis/similarartists

http://www.youtube.com/watch?v=eDBxWQtgypY

http://www.youtube.com/watch?v=RKoeoW_sMtQ
http://www.youtube.com/watch?v=vhyWnnRHTWs
http://www.youtube.com/watch?v=wkSrOcUBKBc
http://www.youtube.com/watch?v=XuctI8qwIKk
http://www.youtube.com/watch?v=s7AV928TVxw
http://www.youtube.com/watch?v=cHCNeDdSQEU

too much?

https://www.youtube.com/watch?v=DNbD1JIH344

from 1959, the year that changed jazz

https://www.youtube.com/watch?v=s5UQ7JBOZGQ

Wow I got ninja'd with more Ornette Coleman.