Just like there is no one easier pre-med major, there is no one best pre-med major. Choosing a major should be based on what you enjoy and knowing that you can perform well in. Chemistry might be a good pre-med major for a student that can maintain a high GPA in those courses, but it may be a hindrance to someone who manages to only just pass those courses. The best pre-med major is different for every student. As long as you perform well and it is relevant to the field of pre-med, it will end up being the ideal pre-med major for you.