Mala
Coki
Digital Mystikz (Mala + Coki)
Skream
Benga
Loefah
Kahn
Goth-Trad
Commodo
Tunnidge
Pinch
Cluekid
Cotti
El-B
Horsepower Productions (more garagey stuff)
Jakes
Joker
RSD
Peverelist
Kromestar
Distance
Kode9 + Spaceape
Gemmy
Burial
luke.envoy
Cyrus (Random Trio)
Toasty
Search & Destroy
Shackleton
Appleblim
D1
Hijak
Zomby
Silkie
Quest
Lost
Juju
Tes La Rok
Caspa & Rusko (non brostep stuff)

Best Labels (main artists):
DMZ (Digital Mystikz) Really check this one out, fucking legendary.
Tempa (Skream, D1, Benga)
Chestplate (Distance, Cyrus, Tunnidge)
Big Apple Records (really early Digital Mystikz, Benga, Skream, Coki)
Deep Medi Musik (Run by Mala)
HENCH Recordings (Jakes, Joker, Lost, Eddie K)
Hotflush (Run by Scuba, good artists include: Toasty, S&D, luke.envoy)
Hyperdub (Run by Kode9, good artists include: Burial, LV, Zomby)
NarcoHz (Juju, Djunya, DJG)
Punch Drunk Records (Peverelist, Gemmy, RSD)
Sub Soldiers (Caspa, Rusko)
Tectonic (Cyrus, Pinch, Digital Mystikz, Skream)

Some essential Albums/EPs off the top of my head:

Albums:
Skream - Skream!
Benga - Diary of an Afro Warrior
Distance - My Demons
Digital Mystikz (Mala) - Return II Space
Digital Mystikz (Coki) - Urban Ethics
Goth-Trad - New Epoch
Swindle - Long Live The Jazz (2013 release)
Pinch - Underwater Dancehall
J:Kenzo - J:Kenzo

Dubstep ain't really a album kind of genre.

EPs:
Coki - Red Eye
Everything ever released on the DMZ label
Zomby - Zomby EP
Caspa - Ave It Volume 1
Rusko - Babylon Volume 1
Skreamizm Series (1-7, ESSENTIAL)
D1 (V1,V2,V3)
Benga - Pleasure EP
Coki - Don't Get It Twisted (Volume 1 and 2)

12" Singles (Catalog Number):

Just type these into Youtube or http://www.discogs.com/ and you will find the names of the tunes.

CHST001
BAM003
BAM006
MEDI01
MEDI02
MEDI03
MEDI04
HENCH001
HENCH002
HENCH003
HENCH004
HDB005
HDB006
HDB007
HDB009
HDB011
HDB018
HYP001
HYP002
HYP003
HYP004
HDP001
NARCOHZ004
DRUNK003
DRUNK005
DRUNK008
DRUNK009
DRUNK021
SWAMP001
SWAMP004
TEMPA014
TEMPA015
TEMPA017
TEMPA024
TEMPA026
TEMPA027
TEMPA030
TEMPA043
TEMPA055
TEMPA062
TEMPA067
TEMPA070
TEMPA073

Compilations & Mixes:
Deep Medi Releases (Volume 1-3)
5 Years of Hyperdub
Worth The Weight: Bristol Dubstep Classics
Tectonic Plates Series
Tempa Allstars Series
Dubstep Allstars Mix Series (ESSENTIAL)
The Roots of El-B
The Roots of Dubstep (more garagey)
Box of Dub (1 and 2)
Rinse: 02 Mix
Rinse: 06 Mix
Rinse: 09 Mix
Rinse: 14 Mix
I Love Dubstep
Black Box Transmissions
Steppas Delight
Grime 2 (http://www.discogs.com/Various-Grime-2/master/17887)