Yup, Snake Eater, Peace Walker, Twin Snakes, MGS2, and Guns of the Patriots. What's unfortunate is that MGS3: Subsistence (the good version) changes up the camera scheme for the BETTER while Twin Snakes and MGS2 have broken cameras. So it's going to be an inconsistent journey, but it's very worthwhile. From a gameplay perspective, I think MGS4 is the best game (you have tons of options) but from a story perspective, MGS3 is the best. From a mind-blowing perspective, MGS2 is pretty awesome.
Twin Snakes is the best game focused on Solid Snake.