What wedding band would look good with my engagement ring but also without it?

I got this ring (very happy it’s stunning!). The rings that are suggested by the website are nice but they’re too thin and dainty. I don’t think they’d be suitable as wedding rings. I need something that is sturdy enough to last, substantial enough to be worn alone but doesn’t look too much if worn with my engagement ring.

Does anyone have suggestions/advice? Thanks