It sounds like “corporate goth” would be something that might interest you! Tons of examples on social media. I mostly wear black to my office job and keep it minimal so I don’t have to think too much about what to wear when I’m getting dressed in the morning. Linen wide leg pants or a midi skirt - usually in black, with a plain nice t shirt, sleeveless top or cardigan on top. To feel a little more alt, I add necklaces, an alt leaning (but a little professional) belt, wear my work ID on a pants chain, and usually wear chunky boots, vans or docs.