Hi BlueJaye,
That is a thought provoking question. I have worked for three top 100 companies in the country. They have been a mixed bag with regards to how they handle trans specific workplace policies. I left the first company to work for another company where I made a lot more money. I had my own office, company credit card, benefits, and pension plan that were amazing, and flew around the country for work. I came out to my boss, and five days later, I had no job.
Move onto the next company. I had transitioned, have "passing privilege", and again, in a top 100 company. I had a boss that treated me very poorly, and coworkers who started to misgender me. I found out that my information on file for HR had been leaked, and that's how that went down. I was then openly harassed and discriminated against for being transgender. The Chief HR Officer had told my boss who was a transphobe, and he in turn disseminated this to other colleagues. A short time later, I was let go, "without prejudice". Only this time I was wiser. I settled out of court for a large sum of money, with the addition of anti-discrimination and anti-harassment policies that are second to none that I have ever seen.
My point is that it doesn't matter what you do for a living, or how well you "pass". It is all about the people you work for, and the rules that they have in place for employee protection. I wish that I could say that my experience was positive, but it wasn't. Ultimately, you must stand your ground, and be the happiest you that you can. You know your industry, and you know your colleagues and clients. Just remember that a company's shareholder equity is severely compromised by discrimination and by the libel actions of its employees. In short, it's really bad for business to discriminate. You be you, because that is the best person to be!