if you're into instrumental hip hop deffo check these out:
DJ Shadow - Endtroducing..... (plunderphonics/instrumental hip hop)
RJD2 - Deadringer
Madlib - Beat Konducta, Volume 5: Dil Cosby Suite (instrumental hip hop)
Madlib - Shades of Blue: Madlib Invades Blue Note
If you're into lofi/instrumental hip hop:
[bsd.u] - late night bumps (his newer stuff is good too)
Jinsang - solitude/graditude/lighter
Vanilla - Origin (or anything by vanilla really)
if you're into trip hop:
Massive Attack - Mezzanine/Blue Lines (or any of their stuff really)
Tricky - Maxinquaye
Portishead - Dummy
Nightmares On Wax - Smoker's Delight (In a Space Outta Sound is good too)
if you're into downtempo:
Air - Moon Safari
Morcheeba - Big Calm
Zero 7 - Simple Things/When It Falls
Anything by Theivery Corporation or Moby
not sure what genre these are specifically but probably electronic of some sort:
Pretty Lights - Glowing In The Darkest Night (most of his other stuff is good as well)
Boards of Canada - Music Has the Right to Children (their other albums are great too)
Aphex Twin - Selected Ambient Works 85-92/Volume II
Flying Lotus - Cosmogramma/You're Dead!
Röyksopp - Melody A.M.
MGMT - Oracular Spectacular