First, I recommend studying photography. What you're asking has far more to do with the photographer than the camera. Most modern cameras can accomplish what you're asking if used correctly. I have a Canon 5d Mark II, a Canon 40D, and a Panasonic Lumix DMC-LX5 and a Canon SD500. The range of prices varies from a couple hundred to a couple thousand, but I consider all of them good value cameras, and I can accomplish the task you've set forth with any of them.
Your best bet will be a camera that can shoot in RAW, which probably narrows it down to a couple hundred models. As far as best value, that question is nearly impossible to answer. We're not even sure what class camera you have in mind (SLR, micro 4/3, compact, etc.). If you give us something more to go on like budget, any particular features you're looking for, experience and additional things you'd use the camera for, that would really help.