what's the craziest campaign you can possibly have?

I've been going through and collecting the Very Hard victory achievements with a bunch of factions. I'm still missing most of them even after >1500 hours, simply because I usually don't play until the Long Victory.

I've started using the endgame crisis to get through them faster, simply bc the victory conditions suck a bit for a lot of factions and I don't always want to play through the slog. However that also gets boring and I want to mix it up a bit.

So here's my question - what's the "craziest" possible campaign you can have, however you define that?

If I set the ultimate campaign crisis to happen from like, turn 20 for example, who should I play as (and what other settings should I use?) to really enjoy totally upsetting all the dominos?

My initial thoughts are someone like wood elves or vampirates would be good (I don't play chaos) as they're not focused on holding territory so much, but I'm open to ideas.