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Based on the information provided , you might be suffering from a Dermatophyte infection
called Tenia corporis. All the areas you have mentioned areas where you sweat a lot, which predisposes to fungal infection
All the medicines you have mentioned will definitely help in treating the condition. And yes you can use dettol
soap along with him. If you are not happy with dettol you can go for TETMOSOL soap which is an age old antiseptic soap.
Remember one thing as i have already mentioned that excessive sweat and wetness in this area predisposes to infection. Therefore i strongly recommend you to keep these areas as dry as possible.
Have a good health
Bye & Take care