(yes, I'm aware that no one knows who this is. Even I don't have copies of any of those long-gone comics, and that ten pixel wide jpeg from a later reboot is the best image I could find by Googling him.)
Welton Colbert was an imaginary 96 year old retired cartoonist who did webcomic reviews despite hating every comic and never spending more than one panel remembering what he was actually supposed to be talking about.