Crossland makes big maps with a good amount of detail. Usually with a single theme. https://www.patreon.com/crossland Crosshead is the related project and they have good assets for dungeon draft.

Czepeku makes very detailed and expressive maps that tell a whole story. They are fairly fantastical and I use their website's map search to find inspiration. https://www.czepeku.com/

I've been looking Darkest Maps lately. They've got good horror and eldritch stuff while also a bunch of standard fantasy. https://www.patreon.com/DarkestMaps

2 Minute Tabletop is great for simpler designs that tend to be less cluttered and a bit more rough and low poly on line work and detail. But they still look great. https://2minutetabletop.com/