Forehead acnes. But nothing works?

I had acnes problem when i was 14 yrs old... when i was 16 i take treatment for this.. thn i take treatment for atleast 2 yrs continuously.. my acne was cleared from cheeks... but my forehead acne are remain in present.. my forehead is not clearing.. i tired using salicylic acid and benzoyl peroxide and ketoconazole but nothi works... my skin becomes very dry when i washed my face and if i apply any moisturiser it became very dull and acne coming... what i can do to clear my forehead acnes and prevent my face from drying without making it dull??? I used oil free Moisturizer acnemoist , cetaphill , Neutrogena oil free Moisturizer but nothing works??? Please prescribe me a good face cleanser and a good Moisturizer