You forgot a few.

 Innosilicon
 LKEtc (and BW.COM by extension)
 Gridseed/SFARDS
 Alcheminer

 Too early to tell on the X11 miner makers, but all three of them so far seem to have actual legitimate products, abet with some issues here and there.


 By Cryptocoin Miner Manufacture INDUSTRY standards, Bitmain is well above average on reliability and trustworthyness on gear sold, so-so on warrentee repair.
 By the standards of MOST industries, they could use some improvement across the board.


 Innosilicon has done sales to small miners also, especially those "Farm Boy" units that appear to have specifically targeted the small miner.
 They also made miners that had a VERY VERY GOOD reliability record - better than anyone else in the industry except LKEtc (then again, there seems to have been some cross-manufacture and/or cross-design on some of that gear given the Dragon and Terminator designs and LKEtc using Innosilicon chips IN the Dragons).


 Sadly, most other "direct to small miner" companies have either not done well in the long term even when they had a good product (Spondoolies as the best example) or were outright scammers/liars/incompetant (can YOU say KNC and Butterfly Labs, among other WORSE examples?).