I also like the second picture. Have you thought about a skinny plain knife edge band, such as Tiffany’s? I think their shape really lends them to being far less invasive, if that makes sense?!
Plain band! Plain band!!!! Love this look. And, having a similarly set eternity ring, there should be no prong damage on the eternity ring. Wasn't sure if the diamonds on the eternity ring were touching the prongs of your e-ring though. If they were, then this beautiful gold band in between is the perfect solution.