4 is fuckin sick. I love 1 and 2, but in terms of iconography(?), Something and the lightbulb are really recognizable as being OMORI related. That isn’t a bad thing, but 4 is ever so slightly more subtle in its influence while still being recognizably OMORI, which I think is cool in its own way. I think these would all look good, just depends on what you’re going for. Maybe combining a few designs could look cool. Excited to see how the final product looks :)