I mainly replying to confirm I think a normal EU sized cabin case works for this. I use a Salsa Cabin Deluxe and I’m a few sizes smaller on the chest but tall, so have long jackets and trousers.

It’s typical for me to pack: 1 suit, 2 jackets (I think a blazer is often thicker than a suit jacket), 2 trousers, 4/5 shirts, several casual items, gym kit, trainers. I will sometimes also pack my shoes if I’m wearing Grenson boots to travel. These days I tend to wear Tods which work for all occasions.

I almost never rewear cloths on a trip, except the jacket / trousers and gym kit.

My laptop bag is one of the smallest but expandable Tumi bags so I don’t use that as an overflow. I also recommend the jacket tip above, that’s how I fold after seeing it in GQ.