For companies, I'd go something like...
1. Nintendo
2. Maxis
3. Rockstar
4. Sony
5. Harmonix
6. Blizzard
Microsoft doesn't get much credit for anything, AFAIC. GoldenEye, Half-Life, Dreamcast, etc., existed before XBox, y'know.
And for Sony, I wouldn't give them credit for third party franchises like GTA. Furthermore, the PS2, Gamecube and XBox were a pretty linear following of the PS1, and so the credit for creating that platform norm goes to Sony of the 90s. Also, remember that they failed in their primary goal for PS2 and PS3, of leveraging the power of the box to create a multi-media "set top box." What they do get credit for is increasing opportunities for third parties and expanding the games market in Europe. But since that credit is split between the 90s and 00s, they don't challenge Nintendo.
For individuals, all I know is that Iwata would be #1 by a mile.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.
