Daily reminder that Dr. Gero created a perfect living being that could easily wipe out even the strongest gods with just several month of training
Sciences BTFO mythical
So did Senbei.
But Cell isn't nearsighted so I guess he has the edge.
Bibidi made a being capable of absorbing evey being in existence had and gain their abilities and inteligence, it also had superior regeneration.
Bibidi > Dr. Gero
He'd probably have been less vengeful than 17 and 18, but I could easily see him not caring much if Gero was killed while he was attaining his perfection.
If given the chance to destroy the earth, he'd probably not have a problem killing Gero along with it.
I believe Cell has genuine respect for Gero as far as his scientific prowess is concerned. After all, Cell by design is a potentially ETERNAL living monument to Gero's success as a scientist. That's a hell of a feat.