Leeeeet's count!
1. Striker, as mentioned
2. Satan – oh, what's that? You're saying this guy used to rule Hell before Lucifer? Ohhhh wait, here comes Viv to ruin it with her "umm akshyually, he was lying, sorry you couldn't understand my subtle writing

"
3. Pilot Stolas – we could've had a menacing, yet hilariously depraved antagonist, but noooooooooo....
4. Crimson (and Moxxie by extension) – I dunno if he could be
good, but he could at least be better... You'd think this guy would be a personal antagonist to Moxxie, but instead he's getting up to retarded "saturday morning cartoon villain" antics – like, what the fuck was he trying to accomplish by kidnapping Fizz?
5. Alastor - just look at the leaks. Enough said.