First off, as a caveat, I have seen Jurassic Park. I have read Jurassic Park. No way in hell I would ever bring back a dinosaur, no sir, no how, no chance.
Having said that…
If I had to bring back a dinosaur I would want to find something small enough that if I needed to I might be able to kick it’s ass in a fight. Given, as previously stated, that all of my dinosaur knowledge comes from reading Jurassic Park, I would probably go with the Compsognathus. That’s the little guy in the movie that acts as a scavenger. Sure there’s a scene somewhere in the book, and the second movie I think, where they eat a person, but they are supposed to be the size of a turkey.
Here’s what the wikipedia has to say about them:
Compsognathus is a genus of small, bipedal, carnivorous theropod dinosaur. Members of its single species Compsognathus longipes could grow to around the size of a turkey. They lived about 150 million years ago, during the Tithonian age of the late Jurassic period, in what is now Europe.
https://en.wikipedia.org/wiki/Compsognathus
That is my first thought. I wonder though, is there a small plant eating dinosaur I could go with? Let’s ask the google.
Acrotholus audeti is a plant eating dinosaur, about 40 kilograms and about six feet long. That’s a bit bigger than I would like, but it’s a veggie-saurus so maybe it evens out. It could take me in a fight, but it wouldn’t eat me. So maybe that’s the winner.
Still though, as previously stated. Don’t bring dinosaurs back. Just because you can do a thing, doesn’t mean you should. Just like Ian Malcolm said.