Cyber Errol because he is a better villian
Lv1 Gets on his racing vehical and crashes into dark eco tanks for a small explosion (he jumps off of the vehical before hitting the tanks
Lv2 A dark maker comes out and it runs around killing people like heihachi's level 2 with kuma
Lv3 Gets in the dark Maker robot thing at the end of Jak 3 and the player has full control of it and it shoots the dark maker purple stuff and stomps
Gol and Maya could do a Zelda/Shiek, and two sets of attacks, Gol slow and powerful, Maya fast and weak
or the 4 sages as a pokemon trainer style? Red eco strong and slow, close range
Yellow eco medium stregth and power, but long range
Blue eco Fast and weak, medium range
Green eco can be medium stregth, low power, all round range, and has a very slow auto AP gain (due to green eco)
also, cyber erol would be the best fit as a character from the jak 2 - 3 series
i could also imagine having sig, as a more melee, very strong character, who can charge his peace maker or not, rather similar to samus, exept homing
I just got Jak II, so I can't really specify who I would want as a villain rep for the Jak and Daxter series.
Although, Errol does sound like an interesting choice.
It gets more interesting because of Jak 3.