What ceratpsians would be good for JW?

Triceratops and I think a smaller species like Styracosaurus would make for a good "supporting" ceratopsian.

Triceratops for sure! Then, I think both Styracosaurs and maybe Pentaceratops would be nice additions... the former being more likely, as it appeared in the novels, and the latter, well, not so likely.

Trike of course, perhaps Styraco as a secondary

So if this is how they show Trike...

I think this would be a cool design for Styraco...

Trike, with a styraco and a pachyrhinosaurus in more minor roles.