list of OSes I've installed successfully on *something* and actually used it for more than a "huh, that was interesting" or an experiment:
OpenSUSE (starting around 10.2, up to semi-recent stuff)
Ubuntu (nearly all versions since 7.04, but definitely every Server LTS at least once, plus Kubuntu, Lubuntu and Xubuntu at least twice or thrice each)
Debian (several versions, but mostly wheezy, squeeze and jessie)
SmartOS (twice, dedis, used in production for nearly a year for my primary dedi)
OpenSolaris (once on a laptop - it was bad; a few brief forays on servers)