I'd advise against using two or more antivirus programs as they are a resource hog and may have some difficulty playing nicely with each other.
I use the Windows Defender that comes with windows 10 and common sense to keep my machine clean; the second item being the single most important component of antivirus. If you don't trust the Windows Defender, I'd go with the AVG alone. IMO most free antivirus programs are roughly comparable and many of the paid ones work equally as well as the free ones as they mainly share the same definitions. Most random virus problems are zero-day exploits that aren't going to wait around for your antivirus update, no matter which antivirus program you use. They hide in the predictable places; on unsecured/not updated machines and programs, in email attachments, on shady websites, etc. Hence, common sense.
What you get for paying for higher end antivirus is heuristics, or the ability to predict virus like behavior for viruses that are unknown in the definitions databases. Some programs are better guessers than others, but security comes with less convenience as much of what you do on a computer is the same as a virus (i.e. modify and move files, give permissions, etc.) and you'll have to tailor the program to your behavior.