I know you said no ships, but I thought I'd throw this in for at least a brief consideration. I'm no graphic designer, so this is the best I could do. And I didn't use Comic Sans, either, so cut me a little slack.
Problem is, all of the content has to be 100% royalty free. A plane text logo meets that requirement, as does one where the image that is rendered is one that an artist allows to be used in the logo - such as our current one here on the forum.