I think if you wanted to drop one of the three spammers you could, they all have different uses when it comes to coverage so you could drop any of them and build your team accordingly. Originally I thought Entei would be less useful (Which is why I initially mentioned only Lucario and Dragonite) but now I am kind of thinking Dragonite would be the easiest member to replace. I really only think so because, while Outrage is a brilliant STAB move and CBDragonite is the hardest hitter turn 1, Outrage can be taken advantage of by fairies for obvious reasons and it kills your momentum pretty quick. Also, with CBnite unless you are packing wish or healing wish support you generally only get one chance to use Multiscale, for this reason I think Roost+3 attacks Dnite is an appropriate substitute.
Defog or spin support is super helpful as usual, as is hazard setting.
Edit: I deleted a paragraph that ended up being redundant.