Affinity
Infect
Zoo
Tron
Twin
Hatebears
Scapeshift
Birthing pod
B/G midrange
RDW
U/X Control
Whitelife gain
This doesn't seem to be up to date. The highest tier decks, as taken from
Ari Lax's article:
Jund (BGR/BGRW) / The Rock (BG)
Melira Pod (BGW) / Kiki Pod (WURG)
Robots
Tron (G/R)
UWR Control
Delver (UR/ URG)
Twin
Lower tier viable decks (original research):
Scapeshift
Hexproof aka Bogle.dec
RDW (R / RBW)
Storm
Ad Nauseam
Hatebears
Restore Balance
Living End
Soul Sisters
Infect
Recent decklists for reference:
(Deck, record, player, event, date)
(I picked these in part on result, in part
on the player and in part on how well it represents the stock lists. I don't necessarily endorse the lists as being optimal.)
That's about the decks that seem like they're worth testing against, though it by no means covers all the viable decks in the format.