I recently had to build out my business casual wardrobe as well. Madewell has taken so much of my money for both regular clothes and business ones. Decent deals on sale and generally a great quality. I’m also tall, and they tend to offer a tall version of everything which is so lovely.
Zara on sale had some decent deals of meh quality stuff, and I did some last bit of filling out with h&m stuff since the clothes budget was blown. H&m has some stuff that will look good for a bit, but long-term quality isn’t great.
To me it’s the best value for price bourbon I’ve found, and it’s very good. I haven’t tried very many of their higher end or limited offerings though.