There is nothing like best indicator Mr op since indicators are met for different purposes and  uses. Your ability to maximize the efficiency of an indicator or indicators make you a good indicator analyst. Trading with indicators successfully requires a lot of back testing to know which one react well to market price without frequent false signals.
Like we all know that indicators lag bringing out false signals which is not best to use them without other confirmations. Using too much indicators can be confusing atimes when is used poorly without good knowledge. This is why they must be used with other technical analysis for confirmation.