Kefka is so evil he even killed the GRASS!

[The Crystal]

and AC Sephiroth is not the real Sephiroth in my opinion

The Sephiroth of AC was the real Sephiroth. The Reunion Files states that the biggest reason he appeared in the movie, was revenge for what Cloud did to him in Nibelheim(and in FFVII).

Ultemacia is only tossed to the side line cause she was so poorly developed. her motive is illogical and her means to fulfill them even more so. She's just bat- crazy and nothing more...

Ultimecia's development was in "Edea's" actions, because Ulti was possesing her.
And what is illogical about trying to gain control over your own destiny(avoiding your dead in the proccess) by absorbing time and space?
Ultimecia was afraid of dying, and even before that, she was already "condemned for generations" by the people of the planet, as she said in her speech in Galbadia.
Illogical? Not at all.


And I agree with you about Kefka being the most evil.