TBH, I think you should just go with RobValue or your actual name. You can put tags on your videos that way people searching for "atheism" or "atheist" will get to you, and also you are begging the question a little. People are going to want to see your wife at some point... 
If you watch a lot of people's channels, you'll see that most of them don't have a theme song intro at all. They have a opening greeting, (Tyler Oakley, Miranda Sings, Mamrie Hart) or at most an animated thing saying their name (Thatcher Joe, Grace Helbig, Connor Franta, Superfruit), sometimes after a cold open. That seems to be the successful model.
Me, I prefer the name animation - particularly Connor Franta's or Thatcher Joe's. It's simple, minimal, and not distracting or requiring a ton of production.
A good example (5.3 million subscribers)
https://www.youtube.com/watch?v=i-6ggWp0KdU
Or this: (6.3 million subs)
https://www.youtube.com/watch?v=nlhAJBDu4Rc

If you watch a lot of people's channels, you'll see that most of them don't have a theme song intro at all. They have a opening greeting, (Tyler Oakley, Miranda Sings, Mamrie Hart) or at most an animated thing saying their name (Thatcher Joe, Grace Helbig, Connor Franta, Superfruit), sometimes after a cold open. That seems to be the successful model.
Me, I prefer the name animation - particularly Connor Franta's or Thatcher Joe's. It's simple, minimal, and not distracting or requiring a ton of production.
A good example (5.3 million subscribers)
https://www.youtube.com/watch?v=i-6ggWp0KdU
Or this: (6.3 million subs)
https://www.youtube.com/watch?v=nlhAJBDu4Rc
"There remain four irreducible objections to religious faith: that it wholly misrepresents the origins of man and the cosmos, that because of this original error it manages to combine the maximum servility with the maximum of solipsism, that it is both the result and the cause of dangerous sexual repression, and that it is ultimately grounded on wish-thinking." ~Christopher Hitchens, god is not Great
PM me your email address to join the Slack chat! I'll give you a taco(or five) if you join! --->There's an app and everything!<---
PM me your email address to join the Slack chat! I'll give you a taco(or five) if you join! --->There's an app and everything!<---