Lemme just say: your description of Marius was so lovely! Whoever is cast, yeah, we’re going to need magnificent hair and we’re going to need to see him actually painting ;D
@sheepskeleton‘s fanart (which is based on Michael Fassbender) is more Marius than Ralph Fiennes, for me, tho…

[^X @sheepskeleton has a bunch of Marius pieces, this is one of my faves.]
Does Feinnes really paint? That’s pretty cool!
Feinnes is 54 and Marius was turned at 40. Movie/makeup magic could make him look younger, but I think we’d need a Marius who wouldn’t age through the course of a TV series that could last for several years. He’s going to be 60 in 6 years 😛

^Idk when this gif is from but I gotta say, yes, he’s got this great fatherly quality and Roman enough features… but the age thing… *sigh*

[X] I’m more into Michael Fassbender, 39 yrs old,

^or Nikolaj Coster-Waldau, 46 yrs old.
… or even better: someone new! Someone less expensive than all those dudes 😉