https://www.tannergoods.com/collections/bags/products/holton-leather-pack-carbon

Fits your brief but a bit pricey

https://www.jansport.com/collections/jsp_ilu/ilu_home.html

I rock the Ironsight from this collection in a business setting, doesn’t look out of place. was reasonable price but limited run

Try over at r/backpacks too because there’s lots of options these are just my favorites