DISCLAIMER: May not 100% match from the Cartoon.

Fortress Maximus, from the IDW Transformers Comic (particularly the Lost Light Series).

And incase anyone is thinking he's supposed to be a titan, in the IDW comics he is just a normal (albiet still large) sized cybertronian.

Created by bfai on CivitAI (https://civarchive.com/user/bfai)