Among these colleges, Madras Medical College is the best option. It is one of the oldest medical colleges in India. It offers huge case studies due to the patient load. The teaching faculties are great. The infrastructure of the institute is quite good. As the institute is located in the capital, it is more or less like a private medical college. 

After MMC, the 2nd best option is Stanley Medical College followed by Madurai and Thanjavur. You will get to witness huge case studies at Thanjavur as it serves as a single medical college for three nearby districts.