What happens when you Cant think of a Signature? You change it to the first thing that comes to your mind. Have a look at what first came to my mind. Conclusion: I really need to rethink life, the universe, and everything.
The "..." in "Making GTM Great Again..." makes it seem like you are unenthusiastic about actually making GTM great again. Maybe change the "..." to just a period, or maybe even an exclamation point!