Chin up, Tom.
I do not have a dominant personality at work. My personality there is "nice".
My personality trait is thoroughly hidden until I need it. Like if I get in a crisis or emergency, or someone attempts to take advantage of "Mr. nice guy."
My dad was in the military, and My whole life has been this struggle to emulate his good side, decisiveness, without emulating his boorishness, his insensitivity, his perfectionism...I could go on.
I've found I can be nice without suppressing my strength, sometimes it takes more strength to let someone else be right!
I've found that I can take control without leaving pain and wounds all around.
But you come across as so confident and self assured. Don't change!