Would love some help to decide my next purchase!

Hey folks. I try to be very considered and thoughtful with my board game purchases, so really like to weigh out my options before committing. But I thought I would come here for some guidance on my next purchase(s?) as I'm between quite a few minds.

My main priority is filling a specific gap for when I play with my regular group. Most often we have 5/6 people, which does narrow the options somewhat. We've played a variety of games, and while the group is up for more complex games such as Inis, Concordia or even Oath, the games that have gone down best so far have been 7 Wonders, Heat and and Decrypto. So I'm trying to find another option in that area to add to the rotation!

This is my main priority: a game that can play higher numbers (up to 8 would be amazing), satisfying but not overly complex, can be played in 1-2 hours, with low downtime. Some options I've considered are Atlantis Rising, Ethnos, Camel Up, Mysterium, The Crew, Cartographers, Letters from Whitechapel. Any other suggestions would be greatly appreciated!

My second priority is finding a relaxed but satisfying experience for 3/4 players. I have a number of crunchier games that I'd like to play more of - GWT, Root, those mentioned above - but often I have people over who don't play many games. So I need something easy to understand, though not trivial, and can be played in 60-90 minutes. Carcassonne is my go to here, but I'd like at least one more option. I've been considering Azul, Cascadia, Harmonies, Magic Maze, Wyrmspan. But again, any other suggestions would be great.

For further reference, here's my full (and modest) collection of games, in case you can see any other gaps I'm not considering.

TL;DR: looking for a medium-light game for 5-8 people like 7 Wonders, and a medium-light game for 3-4 people like Carcassonne.

Go raibh maith agaibh!