Which of these baptisms should be considered valid?

[Zioneer]

Well, I'm a Mormon, so it's kind of obvious which ones I'd pick. A quick correction though; live LDS baptisms aren't done in an LDS temple. They're done in either certain founts in church buildings, or in any convenient body of water (lake, ocean, or river). I should know; I was baptized as an eight year old in one of those founts.

You are correct on the proxy baptisms though.

[Zioneer]

Are those the founts that have the oxen or bison (I forget which they're meant to be) on them sometimes? If so, those are some nice founts.

No, those are the temple ones (which I have also seen and been in. They're very roomy.). The ones I'm speaking of are simple and small, almost bathtub like founts that have just enough room for a large person (Taft-sized) and another person to comfortably do the baptism.