I've been wondering about this myself. I'd think maybe PQ3 would be a decent base as it seems generic enough, but it doesn't have diagonals. PQ1VGA does, but most of them are kind of a top-down view instead of head on. There must be a head on view in there somewhere, though..
PQ1 and 3 alike so
do have diagonals. In fact, the only differences between regular uniformed Sonny in PQ1 an PQ3 are that PQ1 has a different global palette and Sonny's head is different -- both in art and attachedness. His body, fleshtone aside, is exactly the same. My only gripe with these sprites is that you can tell they're digitized from video recordings, compared to GK1 and KQ6.
Which brings me to another thing to consider when picking a base: what height would you go for?
Larry gtfo outta here you're too cartoony to be eligible for this!If I were going to generate some default views, I would probably find a 3d model (and walking animation) I could use, and then render it out in various orientations. I dunno if it would work, but given how bad I am at drawing 2d animations, it's what I might try first.
I actually tried that some time back, and frankly it looked like Sonny and WD-40 got bizzay in all the wrong ways.