I'm not sure what you mean when you said you started with WS, as in you started reading the Winter Solder's run as Cap? But if you want to read some great Captain America stories, I would recommend the following:
-Captain America by Brubaker Cap vol.5 #1-50, 600-619, Vol.6 #1-19, Captain America & Bucky #620-628
-Stern/Byrne run. This was a short run, but one of my favorites off all time. Cap vol.1 #247-255
-J.M. DeMatteis/Mike Zeck Cap vol. 1 #261-264, 267-270, 272, 275-290, 292-300, Annual #6. I saw Zeck at a con about 5 years ago and wanted to get his book, but my son was pulling me away to go look at some other things, and by the time I got back around to Mike, I didn't have any money left.
-Mark Gruenwald/Ron Lim/various Cap vol.1 #307-443, Annual #8
-Remender/JRJR Cap vol.7 #1-25
-Lee/Kirby/Steranko Cap vol.1 #100-113
-Lee/Gene Colan Cap vol.1 #115-137