Consider Fr. Joseph Pfeiffer. He is valid.
That's debatable. We have video proof that Bishop Webster originally mangled the essential form of the consecration to where it was unrecognizable. He's certainly a valid priest.
I knew Bishop Webster very well, and I like him a great deal. And I hold most of the +Thuc lines to be valid. But this one poses some real problems. If Fr. Pfeiffer were to produce the video of the conditional that was allegedly done later, that might change things. But he hasn't. And given how bad the first attempt was, and Father Pfeiffer's assertion that it was valid anyway, we can't simply take his word that the second attempt was any better. Also, I don't know if you can just repeat the essential form in isolation of the entire ceremony and all the surrounding context and have that be valid.