Those all gambling sites you mention have their reputation here so that can be a choice for @OP to start to take a look one by one and hopefully, he can get what he wants.
Besides that, all of that gambling site is old gambling sites that have its fan and will give the best for their members.
I am not too familiar with ESports but if I were @OP, maybe I will follow the suggestion, especially if the site already has a good name in this forum because that means, we do not have to worry about the worst thing that can happen to us.
Those reputations gambling sites will not do a bad thing for their members unless the members cheat them.
I agree, Stake and sportsbet/bitcasino is good enough if you're only betting on the popular tournaments but if you're craving for those less popular leagues then nitrogensports is the way to go.
It's also better to open accounts on each sportsbook knowing you could slowly get limited if you start getting decent profits.