What is the best ingredient for inflamed acne suitable for oily and sensitive skin ?

Benzoyl peroxide: This is not going to be pleasant, but if the situation is as you describe it, you need to start here. Apply as tolerated; you might start with 5%. If you are not clear in two weeks, and this is likely to be the case, get with your personal physician. You're almost a grown man and you need to be rid of this. All acne can be managed but it's usually not simple. Until it remits, keep working.