I don’t think everything needs to be all matchy matchy but this looks like too many different things in my mind.

Between #2 & #4, I like the ones in #2, but perhaps in another color. Have you sat in them? Also, what do the backs look like? , you might not care but I take that into consideration.

The only way this would work is if the chairs were upholstered in a patterned fabric with colors that tied in all the elements in the room, including a rug.

Either…to help you decide, which one is more comfortable and what overall color scheme are you leaning towards (new rug and cushions included). The wood trim on the 2nd might be nicer with your flooring and do you have accessories to consider?

Out of the two, I prefer the barrel. But they look a bit small. Have you seen them to sit in them? I find ordering chairs online can be tricky unless you look at all the measurements very carefully. The taupe chairs seem to bring in a third color, which can make it hard to coordinate everything. What color is the fabric sofa?

That chair is actually dark olive green which are in below picture. Fabric sofa is beige

Pic #2 , my suggestion is to keep them, and the leather sofa and buy a matching leather sofa, face them and put the two chairs with back to kitchen area.

I have green, caramel and beige in my space as well and like it. It gives an organic modern feel. Perhaps an area rug that ties all three colors together.

That is great, do you mind sharing a pic to get some inspiration

I'm in the middle of a painting project now or I'd be happy to. My green is mostly accents. My main colors are the caramel and beige with touches of black. Lots of texture in pillows and a patterned rug that I feel pulls the space together. But I definitely feel a rug that incorporates all three colors will pull your space together and then you can throw in some pillows as well.