^^^ I would call that a star and strip. I think technically a blaze is uniform down the face whereas a horse with a star, strip, snip would have a distinct narrowing of the white connecting the star and snip. Anyway, I'd call it a star, strip, snip.
The OPs horse would be a star, strip, snip. BUT if I was talking to a non-horse person that would look at me like I'm speaking a different language if I said that, I might say something like "uneven" blaze or something.