I am trying really hard to use the term "murder jackals" instead of "murder hobos". I feel the latter can be distressingly classist. In this economic and political environment, too many people are a missed paycheck, hospital visit, or car breakdown away from housing insecurity. Ben and I could be in that spot ourselves with just a few significant screw-ups.
Murder vulture is also a fine term to describe an adventurer that likes murdering things and picking over their carcasses.
No, we're not using "murder hyena" as a term for this. Hyenas are noble animals that hunt far more than they scavenge (source, source, source).
Murder jackal is a good choice, but murder vulture is also a fine option.