I’ve just gone through that journey of finding one as well (though a backpack) and settled on bleu de chauffe. I found it to be a great balance between durability (without going overboard) and aesthetics for my more smart-casual look eg. https://www.bleu-de-chauffe.com/en/men/273-sac-postier-eclair-marinepain-brule-3700716002646.html

I’ve seen saddleback and Marlondo mentioned, and they definitely look sturdy, though they’re too rugged for me and my work