I suggest AVG, personally.
And, even though having 2 security softwares seems safe, sometimes one can try to cancel the other out; resulting with things having a higher chance of slipping through. It also bogs down your computer.
Malwarebytes is very nice though, I will admit.
Also, when a security software or a tune up software checks your disk it is going through all of those program files that most people don't sift through, deleting all files within that are no longer of use, or could be a danger to your computer's health.