These are not minor ones, yet they are all incomplete:
Superman
http://superman.nu/wiki/index.php/SupermanIt's large and is pretty darn good as it stands, but is still missing a lot of information.
Lois Lane
http://superman.nu/wiki/index.php/Lois_LaneThis one is way too short and needs a lot of work.
Jimmy Olsen
http://superman.nu/wiki/index.php/Jimmy_OlsenThis one also needs a lot of work.
Daily Planet
http://superman.nu/wiki/index.php/Daily_PlanetTiny entry for such an important place.
Phantom Zone
http://superman.nu/wiki/index.php/Phantom_ZoneToo short needs tons of work.
Supergirl
http://superman.nu/wiki/index.php/SupergirlThis one also needs a lot of work.
Legion of Super-Heroes
http://superman.nu/wiki/index.php/Legion_of_Super-HeroesThis one also needs a lot of work.
Jor-El
http://superman.nu/wiki/index.php/Jor-ElThis one is pretty good and detailed but it's missing a lot of info.
Lex Luthor
http://superman.nu/wiki/index.php/Lex_LuthorSmallville
http://superman.nu/wiki/index.php/SmallvilleTiny entry for such an important place.
There might be more that I can't think of.