I too took all of the Psych courses in your first list and did well on them using just IC as a study guide. I would recommend World Pop versus ECE Org Behavior...I think you'll find it a much easier study, especially now that IC has a study guide for it. Many people have been stumped by ECE's Org Beh. & ECE's Human Resource Management (myself included
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As for your bottom list, if you need just one of them, I would recommend the Intro to Psych class. It will prep you for the rest of the Psych classes you're going to take, plus it was an easy A for me using just IC...sort of see the trend there....?
Whatever you decide to do, GOOD LUCK and keep us posted on your progress.