I tend to prefer narrower archetypes selected to be suitable to the intended experience.
However for an OSR system I'd say it's better to have a handful (three/four) solid core classes. Possibly even just making them the only classes and using a system like 2e's kits for customisation.
Possibly my favourite class set is in Romance of the Perilous Land, because I can see how every class bar Thief can have a clear tie to the setting, which can then be customised via background skills. But that's just me liking setting ties, not a bad set of classes in and of itself though.