Need help picking out a (figurine) gift !

I'm not too well versed in Warhammer 40k, but I know a guy who's a big fan and he tells me about it from time to time and I'd like to grab him a gift.

I don't exactly know what he does and doesn't have, but off my memory he likes Deathwatch the most, and also is a fan of the Nightlords and Crimson Guard. I'm unsure exactly what to grab, since I don't wanna get something he already has, so I'm assuming a unique unit would probably be the best idea. Oh- and Tyrranids. And he recently got a Khorne Berserker set.

I was considering paint, but I figured that might be a bit of a bland and forgetful sorta gift.

If anyone can provide me any guidance on some cool guys to look at, maybe sufficiently niche to where it's possible he doesn't have it, but also well-liked enough to where it's cool. Sort of a goldilocks zone. I'd be happy to provide any more details, and recount anything to my knowledge. Sorry that it's vague.