That sure puts "founder mode" gripes in perspective — Napoleon was trying to run an empire, yet externally not only did he have General Winter as an enemy, but internally he couldn't even leave his direct reports alone unsupervised without them getting into each others' wives' beds.
Bessières showed himself to advantage on the latter point because not even his wife was aware of his affair (apolitically with an actress) only discovering it when going through his papers to settle his estate. After a quick glance at his fr.wikipedia page, it seems Bessières may have been a good example of a successful "bigcorp hire"[2]: lacking the audacity and prowess of the other Marshalls[3], he made up for it by staying out of trouble and staying loyal. (the latter point, and Bessières having left no fortune, suggests he may even be placed among the clueless?)
[0] had not my Goddonkey sang froid? https://news.ycombinator.com/item?id=41482398
[1] brag: I've seen Bayard's panoply with my own eyes
[2] he even started out on the royalist side, and unlike Murat and Junot, wasn't already part of Napoleon's crew for the "whiff of grape".
[3] compare Bernadotte, Murat, Poniatowski, Saint-Cyr, ...