I love your style and don’t really think you can go too wrong with the brands you’ve picked from! Some of my most stylish friends are wearing & Other Stories indigo coloured, high waisted, wide leg jeans and I think they’d look great with all of the top halves above and a blazer/trench. Depends how casual you want to be - I’d wear pretty much all of your selection on a normal weekend day so wouldn’t feel the need to dress it down much further! To your existing picks I’d probably add a nice plain white tshirt, smartish trainers, ankle boots/loafers, the aforementioned jeans and the french coat you mentioned. I think that would give heaps of options from v casual with the trainers and tshirt (nice with either the wide leg trousers, jeans or shorts), to suitable for a nice dinner eg lace top/waistcoat, blazer and ankle boots. You’ve made me want to go and sort out my own wardrobe!