Don't forget that for the rider position you also have to watch ground clearance. IIRC Alan Cathcart did a test drive on an Alligator and managed to drag a foot off of a peg in a corner, resulting in a broken ankle. When checking that everything on the bike fits into your required full-bump lean angles ensure that the rider will too.
The Yamaha 'gator above has the peg 3" or so below the axle, while many sport bikes will have them at axle height or above and they still need to have folding pegs for extreme cornering.
If you are talking about a slow-speed commuter then you can probably plan on a more upright position and lower pegs, but if you have to make an emergency hard-lean turn you don't want a peg levering the bike off the ground.
I think some recumbent push-bikes have very high pedal positions relative to the seat and some of those rack up a lot of miles. No doubt it is attention to all the details that will determine how comfortable any given position will be.
cheers,
Michael
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