I think that as long as you don’t mind the Troll feet, then Zandalari Death Knight will look just fine.
I see you have a Mag’har Warrior, I don’t know if you have a Zandalari Paladin or not, but I like how they look in Plate armor, I think they look good, so perhaps go for that for some change?
While you can’t create a Zandalari Death Knight yet, once they are out you can create one and see how they look on Death Knight sets. For now you can make a Zandalari Warrior and see how Plate armor that can be mogged by any Plate class looks on them and compare to Orc, to see what you prefer.
You can use the dressing room feature on wowhead and select Zandalari and Death Knight and then dress it in any set you wish. Will give you a feel for it.
On Topic: I’m unlocking Nightborne now that they have been confirmed as DK. I went from Neutral (Friday Night) to 10k/21k revered now (Sunday Night). It was a big grind but I can’t wait to get NB DK. So maybe consider Nightborne