Use the 4 chairs, but use 2 at each end and 2 facing across the width of the table. It will be easy to see that the table is wide enough for another 2 chairs, but important to show that the room is big enough for chairs on either end.

Which chairs do you think work better with the Luxe Kensington Reclaimed Wood Industrial dining table?

I like all three. Real leather faux and fax. Why not combine them!....... (apologies if this offends anyone, a leather loo seat would certainly offend me:))

I would either have the same muted patchwork chairs or if you particularly want a contrast I would pick a similar style chair that is one of the solid colours that make up the patchwork. I wouldn’t go with the bright chair.