Gaming

similar open world games with good combat systems,

This might be a tall order. Most of the "open world" games I've found either fall down in the open world department (lots of restricted areas or nothing varied/interesting enough to make exploring fun) or fall down in the combat department (awkward, unresponsive, or annoying in some other way). Some high-profile games even manage to suffer from both these problems despite being great in other ways (I'm looking at you, Geralt).

I hoped for quite a while that the next Elder Scrolls game would keep the good parts of Skyrim (beautiful environments full of unique things to discover) and overhaul the combat into something good, but recent showings from Bethesda make me less than optimistic.

Some people praise the Dark Souls series (including Elden Ring) for both openness and combat. However, if you loved Breath of the Wild, I wonder if the Souls style would be a bit too combat-focused for your taste, leaving the world feeling cold and empty. I haven't played them enough to have a strong opinion about this; perhaps someone else can chime in.

I look forward to the suggestions you get in this thread.

Edit:

I just remembered Subnautica! I recommend this game, but there's caveat in the context of your question: The way it avoids bad combat is to give the player reason to avoid combat as much as possible.

Maybe Valheim?