I think I like that one the most among your space orcs. But he could use some work, in particular, his axe should not have a wodden hilt (so not space-age) or plain steel head (make it plasmaish). Also, his feet do need a little love. I'd lose the skull on his shoulder and try to match his color a little more appropriately.
You should probably just finish all your current orcs and release them in a pack before making any new ones, you know, to make people happy