Oh dear. Ok.
As Cole said, the doctors who do regular yearly physicals are family physicians. That's probably the easiest residency to get, fairly short, and I suspect it's one of the chillest ones to get through (less time on call and such). It's also often considered sort of a thankless job cause you don't get paid very well and work pretty long hours to make ends meet. If you're in a zillion dollars of debt post-med school, money will matter.
Family med and some of the less-competitive internal medicine residencies (some IM residencies- like the ones at the big name hospitals- are competitive even though as a whole, IM is not) are probably arguably the easiest residencies to obtain that will allow you to practice at the end. IM is often the choice of people who want to be general practitioners (doing physicals and such) but go into more depth into each system or who want to specialize further into one of the many fellowships that branch out- cardiology, oncology, gastroenterology....etc. As far as I've seen from IM residents I've worked with, it's a pretty tough residency to get through, but you learn a pretty huge variety of things. As I said, you can either choose to be a primary care IM physician, or specialize further into one of the branches I mentioned. Oh, I believe general pediatrics and ob/gyn are also pretty easy residencies to obtain, again because they don't make too much money (ob/gyn is particularly bad for that because you have overnight call fairly often and you get sued all the time...)
Pharmacists/dentists/optometrists are totally different healthcare jobs, they're not physicians. I'm not exactly sure what the process is for those or how competitive they might be- my understanding is that they all are less competitive/ have better hours than physicians, but again the compensation varies. Also, if you want to be a surgeon, you might not really fall in love with something like pharmacy or dentistry or optometry- I mean, we are talking VERY different jobs here.
By the way, you might also want to look into podiatry. It's less competitive to get into, and I believe you can do a sort of surgery residency where you can perform procedures on the foot and ankle. If you're interested in that area at all, it seems like a pretty cush way to go to me. But you gotta like those feet.
Good luck!