What are the top undergraduate colleges for someone interested in evenutally majoring in forensic science?

Ah, I see the CSI Miami effect is alive and well.

Frankly, if you were serious about this career, you'd be using the pc in front of you to do your own research.

Anyway, go speak with your high school careers teacher/adviser and ask the same questions. That's why he/she is there.

It's great that you don't watch CSI, because it isn't an accurate perception of the experiences of real life forensic professionals.
Becoming a medical examiner requires obtaining a bachelors degree in the sciences, bio, chem, biochemistry, etc.. then either pursuing medical school or as you mentioned a masters and a doctorate degree in forensic science, forensic toxicology, forensic pathology, or the general toxicology programs. I think you've done great research thus far and already know the path you should take.
What might also be helpful is to check out www.linkedin.com which has tons of groups where practicing forensic professionals go to discuss issues in the field, or to provide advise to people interested in pursuing a career in forensics. Try going here to seek a mentor is possible. I would also be glad to help answer any questions as well, as I have a new website www.forensicnexus.com which has a goal to educate people about how to pursue a career in their field of choice. There is a section that lists organizations and programs that offer degrees specific to forensics.
Good luck and I wish you the best in your journey!