Every course that talks about the reality in trading will always be helpful to all aspirant traders. If you aim to be a successful trader, don't look for the best courses, but always think that you will learn most in trading if you have varieties of resources. After all, its not the courses that will matter, its how you deal with the different market conditions and ends up making a good analysis so you wil come out still profitable despite of the market's uncertainties.
Still you could look for the best ones that would be beneficial for you in the long run. Think about it this way, if you want variety, then why not the top 5 of them? That way you will get both the best ones and also the variety you were looking for at the same time.
It is usually not that great to have something like that because it would give you both the best results, and they will have a lot of similarities that you could see and you could take those common things as most sure fire things ever. That way you will find the differences and how they approach it and make the common things and then use each difference to your own liking.