The modding community working on Larian games has a storied history regarding DOS and Baldur’s Gate, and the BG3 community is no different thanks to official mod support for the DnD game.
Yes, you can talk to the dinosaur and Displacer Beast ... Fitting a Ranger class into BG3 in the same way a Wizard fits is a much more difficult task. New players may opt for a different class ...
Bards in BG3 are a great mix of magic and melee ... many spells and instead stand on the frontlines as a bear or even a dinosaur. Thief is basic but can do more bonus actions.