Here is some concept art for a Silmaril and Sci-Fi mashup!!!

Here we have Maedhros! In his armor and just look how amazing he looks!

Here we have Caranthir. He's a bit of a cyberpunk here but it works well for him.
Also, he has a tattoo. Most likely a few on his arms and chest.

Still working on maglor. Need to give him a hand, fix his other hand and spice up his guitar and clothes.
Note: do not get Sci-Fi Maglor upset. He will blow out your ear drums.

The ones who I have not gotten to get are...
Amras and Amrod
Curufin
Marion
Celegorm
Fingon
Fingolfin
Feanor

And one of the Valar, either Mandos or Manwe. Not sure yet.

And very possibly Finarfin.