urgent: natural fiber or sustainable brand corporate clothes?

i'm starting a corporate in person job next week after being entirely remote for the past 3 years, i typically thrift stuff but my start date is next week and i don't have enough time to grab everything i'd need. i also gained weight since my internship 4 years ago so a lot of what i'd saved no longer fits...

i'm ok spending money for nicer clothes but would love if there's any reasonably priced (ideally firsthand shirts under 70) clothing brands that are stylish for gen z ish workplace attire? i typically dress very jewel toned / indie and am a size M/L with a bigger chest, pls also plug your stores if you're a reseller, i'd love to check out your stuff!

my company's vibe is super casual but even if i'm wearing jeans i'd love some nicer tops/blouses to throw on!

pls no shein or zara or anything like that! i'm hoping for timeless staples that will last awhile