Just a thought!

You could consider a bike rack and use a nice looking battery bag! Use that option on my recumbent trike conversion for the exact same reason. I did not like the down tube look on my trike. Felt like it made things look more busy if that make sense. I can send a pic if you like. You can't really tell there's a battery in the bag. Topeak has several options that looks really slick. They have some quick release options for the rack and the bag. This way you can easily remove both if you like.

One more thing! Since i was going to use a rack w\bag, I went with a PVC battery that does not have a case around it. Only the plugs for charging and connecting to power bus.

Hope that helps 😉