Unless his stance is over 25", I doubt he is going to have a problem with any of the above mentioned boards in 154-155 wide range.
I have a 23" stance width and all of the 154-155 boards that I rode from my list above accommodated my stance easily. Just one set of holes away from reference. There were still 3-4 more sets to widen my stance.
I understand you had a friend that had a problem with smaller sizes due to his height gjsnowboarder, but he was a rare exception. I still believe it had to do with the particular type of board more than any other factor.
I demoed all of the above boards in the 154-156 range. The widest I had to go was one set of holes out from reference to make it 23".