Oscarus

Honestly, I feel I shouldn't ask, but I have to. 

Do you think that if I used Legendary Pokemon eligible for OU (or lower tiers) in competitive battles, would that be... "unfair"? 

This may sound weird, but if we consider many Legendary are being constantly complained about, especially likes of Lando-T or Tapus, I am afraid of using them because I don't wanna be called "meta slave" nor see they saying that I've only won because of that Legend, and can't play properly. Of course, those are said by players whos team are stacked with those and Uber-worthy Pokemon. 

Okay, straight to the point - I can't find a fitting Mega for my team. And I'm beginning to wonder if I should return to using Mega Tyranitar (either bulky full offense or fast Dragon Dancer), and then fill the last spot with Legendary of sorts. Or other Pokemon whos quite strong or can work well in Sandstorm, like Excadrill. 

To be fair, I'm not switching out any of the previously mentioned: Skarmory, Scizor, Tyranitar, Hydreigon and Chandelure, as all of them are doing a great work, and synergize very well with each other. I simply wanna hear your opinions.