You said he was a high ranking Nazi guy.
Now dont half ass his character. Make him full on evil, manipulative asshole. Bring back those over the top BO1 style voicelines
LET THEM MAKE RACIAL JOKES based on stereotypes and etc. Let there be small distrust between them. Especially Dempsey, Richtofen and Nikolai. These people’s history is soaked in blood of each other.
This will not only create space for future development of these characters, but also make them more Appealing to play as.
Like I dont give a flying F about BO6 crew. Because they are all bland, too safe and forgettable. While everyone still remembers Homoerotic Sus Richtofen