Not op, but I thought that the roles for Rabban and Feyd were absolutely ham-fisted acting in the Lynch version. Maybe there was a goal to communicate complex character elements in a highly condensed way, but it just comes across as clumsy to me.

Baron was fine if not better in the Lynch version.

Note that I watched the Lynch version in a theater in the 80s and recently rewatched it, and my feeling about the acting portrayal of these two characters was the almost exactly the same then and now — painful to watch.