- 11 bit studios
- 1С Publishing
- 505 Games
- Adult Swim Games
- Annapurna Interactive
- Armor Games
- BUKA Entertainment
- Chucklefish
- Coffe Stain Publishing
- Curve Digital
- Daedalic Entertainment
- Deck 13
- Devolver Digital
- Digital Tribe
- Double Fine
- Fellow Traveler
- Finji
- Good Shepherd Entertainment
- Headup Games
- Herocraft
- HypeTrain Digital
- Humble Bundle
- Indiegala
- Kiss Ltd.
- Midnight City
- Meridian4
- Mode 7
- Nicalis Inc.
- Nkidu Games
- No More Robots
- Paradox Interactive
- Positech
- Raw Fury
- Rising Star Games
- Sliterine Ltd.
- Square Enix Collective
- Starbreeze Studios
- Team17 Digital Ltd.
- Tripwire Interactive
- tinyBuild Games
- Versus Evil
- Wadjet Eye Collective
I feel like the bolded (Adult Swim Games, Annapurna, Chucklefish, Digital Devolver, Double Fine, Paradox) have been successful, at least to some extent, or are capable of building their brand, though there are still a lot of games that I can imagine these publishers may not feel comfortable with making an effort to fit under their brand but would benefit from brands, at least as strong as these, though preferably stronger, that have the right identity and/or leadership which would feel comfortable taking them on.
Just like to add that literally every studio on this list went to both Steam Dev Days, specifically so Devs could mingle and get in contact with them. I walked away from Dev Days with a suitcase full of business cards, many of whom I still keep in contact with. I remember, at the first Dev Days, the Adult Swim people were basically just walking around the lobby, going up to random people and being like "So pitch me your game"
In fact, I saw a contract get signed right out side the main conference room on some dude's backpack.