I recommend a Parasaur thats a lvl that you can take down quickly. It has a high chance of escaping while your trying to etheir hunt it down, or capture it, so try to go in an area with lots of forest, so then it will get stuck. It was easy to lvl up for me. It will take any berry, so try feeding it that, and get those purple ones too. I had a para that was lvl 29, but it died trying to kill a triceratops. Its name was Paray.
Are you a new Ark player? A Tipp for you. He is fast... faster than you. The best way is craft Bola and Bola the Parasaur. Knock out and feed it with Berries. Dont miss nacoberries... Good you tamed it! Craft a Parasaur saddle and ride it! Good luck.