Hi Moduckman:
I completely understand with your experience. It is very frustrating.
To share in your pain, I went through the same thing. I went through at least 30 queries to agents, all said no.
I tried small publishers--all said no.
Then I found an agent, a complete and total dud.
I found another agent who was interested for about 15 minutes. He sent the book to three publishers who rejected it and then he rejected me.
I gave up, again. I think I put the book away for at least 18 months on and off.
When I found my current agent, what a difference. She is a REAL agent. She took the book because she believes in it. And, she never gave up.
About 30 publishers gave up but she didn't. That is what you need.
Have you looked into Writers Market online. You an sort for just the agent you need there,
Blockbuster???? The only people who have blockbusters are folks like JK Rowling. or Hillary Clinton. Us normal folks don't have big sellers.
I have spent money and worked like a dog to get the small about of press I eventually received. It's very difficult.