The best ones for my money: MS, ND, SD, WV, SC
Alabama, Texas, Arkansas, Kentucky, Louisiana, Nebraska, New Mexico and Nevada are also all pretty damn lucky.
Indiana, Missouri, Kansas, Oklahoma are probably right after that.
Pennsylvania, Ohio, Michigan, Georgia are probably in the next tier.
After that, you have states with a bunch of schools but where the benefit for those in that state isn't as great like New York, New Jersey, North Carolina, Illinois, Virginia.
The other thing to consider is tuition. Being in PA for ex might make things easier to get into an MD school but the tuition of all their schools is hideous. Likewise NC doesn't have all that many of their residents stay IS but if you do damn you got it good with Brody or UNC for tuition.