I don't actually think they're liches, since the undead according to the lore we've gotten so far usually aren't directly intentionally undead, and have a hard time if they're re-killed of coming back.
Personally, though, I plan on having a Shapeshifting, Necromancy, Warfare undead lizard! Or, that's one idea I've tossed aroudn. Another is a necromancy-hydro pure mage type, healing himself and his allies, and occasionally blasting enemies with necromancy and 'healing' to mess 'em up.
Or another, for example, is a human or elf skeleton one-hand user who uses axes and shields. SKELETON WARRIOR.
Oh the reason I thought they were very close to a Lich is because in a very early video they said that there will be a civilization of certain Undead called "The Chosen Ones" that had the ability to resist the pull into the hall because of a big secret, they are a civilization so we can assume they kept all their intellect, personality and mind they had before death, the only Undead that are able to keep all that other than vampires are Liches , even vampires start to lose their mind if they don't drink blood.
Then again, I know Divinity got it's own lore and stuff, but I only called them Liches because that's what the Chosen ones reminded me of the most.
I don't think that Divinity's universe HAS liches or vampires. It's got its own set of rules. I could be wrong, though.
Anyway yes, there are three kinds of undead, but technically ALL undead keep their minds for a t least a while.
There's ones who are there purely by accident, and slowly lose their mind. (Dunno their title).
There's The Risen, I think it is, who are raised by necromancers as servants, driven along by a drug-like addiction to Source.
And there's The Chosen, which are there seemingly at random, though MAYBE intentionally, who keep their minds with a secret method and seemingly don't need to feed on source to keep going full steam.
