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Since you bring up naming, man/unmanned really needs to be dropped for crewed/uncrewed. NASA technically adopted this in 2006, but they still mess it up. Here's more info on their terminology, as well as other options you brought up:

https://www.planetary.org/blogs/emily-lakdawalla/2015/100509...

Thank you for that, pretty much exactly what I was wondering.

Presuming "uncrewed" gets added to the dictionary I would expect that to prevail as the antonym for "crewless" might reasonably be "crewful", which also sounds weirder than "uncrewed"/"crewed".

Satellites. Voyager. Spirit Mars rover.

"Space ship" works. :)

It's fairly generic though. If I needed a more specific term for space planes like this, I'd probably go with orbital drone", based on terminology used in various sci-fi franchises.

Most spacecraft are already unmanned. It's redundant.