While Atlas is the most prominent figure for supporting the heavens, I don't know if I'm going off on a tangent... but most religions had some sort of quadrite system of supporting the heavens. Or a system of four supporting pillars and one central. For example, various native american cultures thought that either a mix of four animals or elements of nature supported the heavens, the Mayan's had a tree Yaxche, whilst ancient Chinese myths also had their own take. Furthermore, it was argued that part of the function of the Tower of Babel was to do so. The Ancient Egyptians had a Pillar of Heaven, and the Japanese also had one or two pillars. The Egyptian God Heh specifically is known to have supported the sky in similar fashion to Atlas.
nothing yet, but I suppose I'll keep looking. Anyways, food for thought.
Oh wow, that was obvious, I thought I tried Titan earlier and it didn't work... must've missed it, at least it was a great learning opportunity.