Same situation here, deep voice, 6’8″ and will never be seen as female.
I’m on hormones many years and have only small breasts to show, there has been no other overt feminine changes to my body, voice, persona, whatever.
I am forced to accept this as my reality and will continue, even as far as GCS eventually. I will live outwardly as male, but be female in my person regardless.
The HR girl was floored a few weeks ago when i approached her to get my gender marker changed for insurance. but she said there is another like myself on staff as well.
Be the you, you can be. world be damned., best of luck in all your endeavors, both wanted and vicissitudes