7’ wide….you have to factor in pulling back chairs to get in or out. Minimum is 18” and that is tight. So, right off the bat you lose 3’ off the 7’. That sounds like a possibility, but every person will have to pull chairs under the table before they can leave. I will have to scout for photos, but it seems like you need a long table, pushed toward the wall and a bench seating on solid wall. Not perfect, but an option.

The brown is your neutral. I would recommend choosing two other colours and limiting yourself to those tones as you shop. Blue and green is a nice natural combo, or red/pink and orange if you want to be warmer. Blue and yellow also looks sharp. If there are tiny instances of a third colour (for example, yellow glints on a primarily blue and green floral pattern) that's ok, just ignore them! I wouldn't necessarily hunt specifically for wicker (in fact I might avoid it). And I would avoid introducing other faux "natural" materials such as bamboo or rattan. I also would not do another glass top though it may be ok. That will prevent an almost-match which to me is worse than either a perfect matchy-matchy or a completely different style. Smooth wood, metal with or without a design, plainly molded resin would be good options. As you shop, you can consider whether a given piece would look fine if it drifts into the "wrong" seating area. That will help you visualize whether they go together. If you want to post some pictures of the materials you're already working with like the existing furniture, the materials you will build the features out of, etc you'll probably get some great ideas of furniture that will blend beautifully :)

We have a local restaurant that has those Slope West Elm chairs in leather. They are so comfortable that one night I had my son stoop down and take a pic of the tag beneath the chair when we were dining there, lol. They must be durable because this is a very popular, busy restaurant (pre-Covid). Eventually I might replace my awful, cheap chairs with this chair.

Congratulations! Your home is beautiful, I really like what you’ve done so far. There are so many ways you could go. One idea is to mix casual, traditional, and textured with chairs a touch more sleek, luxe, and modern. I like the gold legs on the side chairs for the connection with your great fixture. Not necessarily these exact chairs, but just to show what I mean: A simpler idea would be to do all Parsons chairs, slip-covered or not. They’re a classic with so many styles, and comfortable. Slip-covered ones would bring a nice softness to the concrete table. Ballard’s has some lovely ones in various colors: https://www.ballarddesigns.com/webapp/wcs/stores/servlet/parsons-chair-slipcover---ballard-essentials-fabrics/chairs/chair-slipcovers/13173?defattrib=&defattribvalue=&listIndex=5&redirect=y&bvroute=Reviews%2FshowHelpfulCritical Lots more custom choices: https://www.ballarddesigns.com/parsons-chair---upholstered/furniture/dining-kitchen/dining-chairs/354296?listIndex=20&uniqueId=354296 PB also has these in custom options: https://www.potterybarn.com/products/pb-comfort-roll-arm-upholstered-dining-chairs/?pkey=cdining-chairs