So you want more coverage? What I will suggest, is you try to fix and placate your skin problems. Try to solve your pimple issues and other skin related issues before wearing foundation or anything of the sort. This will make it easier on you in the long run , and will avoid the skin from getting worse.

However, if you would rather wear foundation to cover them, you need a heavier one with more coverage. That would be MAC . I would suggest pressed powder or liquid foundation though. However, the more it covers, the more it clogs your pores, so be sure to remove the makeup ASAP , so it doesn't break you out more.

Always take off your foundation, make sure that your brushes are clean and dont touch your face too much. Also exfoliate and treat your pimples at the same time

What silence said is right. There's really no way to weark a foundation that won't cause breakouts, as putting anything on your face is going to clog up your pores. There are a few foundations, like Neutrogena, that are made to improve your skin tone and texture, but there's no guarantee they'll prevent breakouts.

The Body Shop (avail in several countries worldwide) offer a range of natural tea tree products to help problem skin including a cover stick & tinted mousturiser etc. I bought it for my teenager in fear that cover up make up under invisible zinc sunscreen would completely clog pores & cause more damage than good. Not sure if it helped but it certainly didn't harm.