It seems to me that Reboot has many people who fondly remember the show. Shadow Raiders (War Planets in the US) is another story. It seems no one even knew this existed even in the 90's. That's too bad, it was a good show.
Other shows:
Battle of the Planets (it seems everyone remembers G-Force over the first adaptation of Gatchaman)
Spiral Zone
Bionic Six
Exosquad (How did this not be huge? Great show, great toys, it should have been massively popular, but now is largely forgotten. They couldn't even sell enough season 1 DVD sets to justify a season 2 set.)
Here is Greenwood (not many know about this very quirky OVA based on the manga, even though its been dubbed and released by two separate anime distributors.)