Front tilt wouldn't help you in any way that I can see.
Unless the guy was laying down perpendicular to your camera.
The feet are nearly in the same plane as his face, just keep the camera parallel to him and you'll be fine.
To see a real difference I'd go for a 12" or 300mm lens. Old Kodak Ektars are nice, any of the 1950s-era American lenses in Acme shutters really ~ $150 and go. Old Symmars are fine, as are Xenars. I'd probably worry about the shutter more than the lens!
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