Hardware: Sega

Software: The LucasArts adventure department
(which in fact never existed, but all these talented guys made some brilliant games and LA let them all go for no reason and buried the franchises).

Single person: Ron Gilbert

Sega all the way. the dreamcast was not the only console that did poorly last gen. all of them did but ps2, so.

Atari from the 80s arcades

haha, this is easy. Atari and NEC had one good system each...

Below is sega's legacy...

Sega Master system - good
Sega Genesis - great
Sega Game Gear - good
Sega CD - bad
Sega 32X - horrible
Sega Saturn - good
Sega Dreamcast - great

Software side...Sega as well lol.

Mmmm... FASA... 3D open-world Shadowrun RPG...

*drool* 

Hardware company I'd resurrect: Sega (Disclaimer: the devil will get me later, though; Aatg885 is a glutton of the worst kind)

Software company I'd resurrect: Midway (can you say "MORTAL KOMBAT!!!"? I can)

Software-Culture Brain

While I find it a shame that Sega ended as it did, they screwed themselves so hard along the way that it was innevitable. They couldn't keep themselves together managementwise, and really did more to capatalize on the gaps in the video game industry that Nintendo wasn't filling more than anything else. That's why they got crushed so handily by Sony.

That said, in terms of hardware, there is no one I'd like to see come back, and the only two companies I'd consider for that (Sega and SNK) are still alive and kicking in the software arena, even if they aren't doing as well as the glory days.

Hardware - Sega.
--They weren't bad so long as they left well enough alone and didn't try to fancy it up with add on after add on.

Software - Sunsoft.
--Master Blaster, Festers Quest, Batman.

Hardware: Sega, I guess...

Software: Working Designs. They brought over a lot of Japanese games that would have never made it otherwise...