Many people are using Eset with MBAM premium and feel it is a good option. Try for some time and if you dont experience any issues, then by all means keep it.
You are correct my friend. Good security suites like Kaspersky and ESET are enough alone when combined with common sense. I don't use OSA since I have SysHardener. I instead bought AdGuard lifetime licence since it was at 50% discount.