The best camera is the Canon EOS-1D X Mark III, but it also comes at a price. It was far superior in terms of image quality, video quality, features, and more. However, the other cameras on this list might be a better buy depending on how often you'll use them and your intended purpose. There are a few things to keep in mind when looking for a camera:
Type of camera
DSLR, point-and-shoot, or mirrorless: It's important to know which camera type appeals to you the most and why. Each of these has different price points depending on their capabilities.
DSLR vs. mirrorless
A mirrorless camera tends to be lighter than a comparable DSLR and they are designed to allow light to directly pass to a sensor, rather than requiring a mirror to manage image capture. A DSLR or mirrorless camera could be worth it if you are looking for a camera with functionality beyond point-and-shoot and you want equipment for a specific reason -- such as professional shoots, wildlife or sports photography, or portraiture.
Speed and performance
How quickly do you want to be able to take an image? Speed is important to consider, as well as how well you can perform with a camera.
This generally applies to DSLR and mirrorless options, but the lenses for DSLR and mirrorless cameras are not interchangeable.
Image stabilization is important if you want to reduce blurriness while shooting at slower shutter speeds.