Videogame console companies without mascots or franchise 'heroes':

Atari?

Panasonic 3DO (Or does Gex count?)

Tiger Game.Com

SNK Neo Geo

Magnavox CDI

$ony, on & off - Sony originally had ENOS, a polygonal head of a spokesmodel, but the company ditched him/her/it in no time flat. Crash Bandicoot used to be $ony's answer to Mario & Sonic before being 'sold out.' The closest thing that $ony had to Crash for awhile was Spiro, and even that character is no longer a $ony exclusive. How long will it be until pseudo-mascots Jak & Daxter get sold out as well?

Micro$oft - Halo's Master Chief was never promoted as a company mascot.

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Are there any other names that ought to be considered, or would you like to discuss some of the companies I've mentioned?