I don't know if anyone can prescribe "ideal" hip/knee/lean angles for you. In general you can lay bike ergonomics out on a spectrum from sport bikes on the one end, with aggressive, crouched, forward leaning rider positioning, to cruisers on the other, with laid-back, feet-forward ergonomics that relax the hips and knees but, I would argue, make for a less active riding position. In the middle you have "naked bikes," "sport tourers," "adventure tourers," "adventure bikes" and "touring bikes" all of which feature more or less upright seating positions (or at least more upright than sport bikes and less laid back than cruisers. I prefer a sporty, active riding posture but at my age I cannot sit a sport bike for very long, so I ride a Suzuki v-strom 650 which is relaxed enough that my knees and hips can take it for a couple of hours straight.