You are supposed to imagine there are more than 16 I think....that it is a village, hence cloud saying "and all the townspeople"

Sephiroth was a good villain because of the way he was, spoke and behaved. The music and the goal. That he was manipulating alien cells to become a god by creating a huge disaster and taking the spirit energy of the people.

He killed mercilessly, he sacrified his "copies", he manipulated cloud all through the story, he slashed Tifa and Zack, he burned down Niblheim, placed a barrier around the Great Crater, he stopped Holy from escaping, he summoned Meteor. He was a genetic experiment.

How many more things?