Iron Writer 2007's "Raven" put Alexander Davion in a Marauder.
However, this is an anachronism, since the Marauder chassis wouldn't exist until a century later. Given the weapons loadout, I believe a Hammerhands 4D allows him to shoot all the weapons described in the story, without breaking continuity.
Per Era Report: 2750, Joseph Davion pilots a Marauder without continuity issues. He dies at its controls on Royal.
Prince Carl also piloted a Marauder, dying in it on David.
Overall, it looks like if you don't know a Prince's ride, you aren't going to be taking too great a risk if you guess Marauder.
From Handbook: House Davion
- Joseph Davion II - BattleMaster