Nintendo EPD, ID, Valve
Terrible business practices aside, as a developer, Nintendo is fantastic. EPD specifically works on flagship titles and where Myamoto kisses each one before launch.
ID- groundbreaking work in the past, and I loved the recent DOOM games. Can't wait for The Dark Ages
Valve- obviously amazing devs, 3rd on this list for not releasing anything good recently (Alyx doesn't count because I can't play it because I can't afford a VR headset)
Boot from a flash drive and try to recover any data you can, but that hard drive is toast