[Dengar]

The problem here is that he does not seem to lack empathy at all. There are a lot of people he cares about, and often gets angry genuinely on their behalf.

Anyway it's not all that important, but it's going to take more than that to convince me.

His moral compass being very specific/unusual and not determined by societal norms seems more in line with autism.

Conversely, psychopaths tend to blend in more since they determine that it's easier to behave the way people expect you to behave.

EDIT: Although the autism angle also kinda stops dead when I consider he doesn't particularly suffer from communication issues or overstimulation.

I still do not think he would be so great with animals if he were a psychopath though.