[Dusty]

IMO an outstanding training regimen for an SF aspirant to undergo in order to ingrain proper combat patrolling habits as well as raid and ambush techniques is Ranger school; this will facilitate the performance-oriented training you may give to your students one day. You'll also learn whether you're tough enough for Selection in some areas such as mental and physical discipline.

In those aspects, and maybe more, I would say "Yes; Rangers can make good SF soldiers."

The sooner you learn that your body will do what your mind says to do the better whether Ranger school, band, cooking classes or wherever...