If the Ruger and the Springfield Armory fit your hand well then I don't think you can go wrong with either of them.
Other models that are likely to fit your hand well because they have either customizable back straps and/or side panels are the M&P line, the VP9, the fourth generation Glocks, and the FNS. All of these are excellent choices.
Other models that are likely to fit your hand well because they have either customizable back straps and/or side panels are the M&P line, the VP9, the fourth generation Glocks, and the FNS. All of these are excellent choices.