Hi Bryan, and welcome.

Try not to get hung up on labels. You like what you like, and that's perfectly fine. Humans are by nature a bisexual species, so it's not surprising if you find your preferences aren't strictly black & white. Sexuality is very much an individual thing, and there aren't always easy labels to describe every single aspect of what we're attracted to.
What you're describing is essentially gynephilia with a specific preference for a particular genital configuration. You have said that you're also attracted to FtMs but are concerned about genitalia: this suggests that you may have some bisexual tendencies, but a strong aversion to a penis on a potential partner. Well, that's perfectly fine.
By the way... you might be surprised at what some other FtMs are willing to do in the bedroom. Not everyone is a top, and we don't all experience dysphoria in the same way. And very few FtMs ever have bottom surgery.