Picky eaters

I need help from all you parents out there in Bloggy land. My 5yr old is the pickiest eater in the universe. Seriously. I take 100% of the blame, when he was younger it was easier to just give in and give him something I knew he would eat....as a baby he would eat anything you put in front of him, but when he was around 18 months or so he started pushing away certain things, I admit I gave in, and now his diet is so limited I am starting to panic and frankly I'm getting tired of cooking 2 meals. I have tried only giving him what we have for dinner, and he will just refuse to eat. I've tried force feeding him, only to frustrate us both. He eats a "normal" breakfast (cereal with milk or eggs and toast) and lunch (sandwich usually) but come dinner time he stalls unless he's given something he "likes"
Here is a list of everything he will eat:
Breaded chicken nuggets or strips (he's even watched me make them from scratch and KNOWS there are made from "regular" chicken but still won't eat "regular" chicken)
potatoes in any form
broccoli
red and green peppers
yogurt
crackers
bananas, strawberries, oranges, pineapple, grapes, apples
bread/buns
jam & peanut butter
pancakes/waffles/french toast
eggs any style
empty taco shells w/sour cream
Froot Loops

Now I've tried and tried to get him to try new things, and just today we had a talk about how it can be scary to try new things because you never know if you will like it or not, and how it's ok not to like it as long as you actually TRY new things....but he won't budge! How do you get picky kids to start trying new things??
Things I've tried recently:
Pasta
rice
ham
carrots
corn
peas
hot dogs
bacon
soup
oatmeal

I need help!!!!!!!

(I am scheduling an appt with his pediatrician next week, he is on track growth-wise and always has been, that isn't an issue, I just need to learn how to get him to eat properly!!)