Final Pokemon To Complete Team

Currently, my team is:
Emboar
Excadrill
Haxorus
Ferrothorn
Terrakion

However, I need one final Pokemon to finish the team. I'm current considering another defensive option, such as Jellicent, or a special sweeper, such as Reshiram, Eelektross, or Volcarona.

Which Pokemon do you think would be most beneficial to the team? I am open to removing Terrakion, but I will not remove Emboar, Excadrill, Haxorus, or Ferrothorn due to the time I put into them.


Thanks for your help!

I don't access to non Gen V Pokemon just yet! Would Jellicent be able to do the job. It was a secondary type of Ghost, so, it will provide immunity against fighting. I knew about the ground and fighting weakness, and hoped that I may be able to remedy the issue by adding the final Pokemon. I may even drop Terrakion, since including legendaries in my Pokemon teams just doesn't feel right.

Ok. After reconsidering my team, I have decided to change a few Pokemon:

Salamence
Terrakion
Ferrothorn
Excadrill
Metagross
Gengar

Is it necessary to have two Pokemon aimed towards the defensive side of the game? In this team, I only have Ferrothorn which acts as a defensive barrier. Metagross can also, but I think I'll use it as more of an offensive threat. Although, I may change Metagross to another Pokemon while I am still looking at available Pokemon.

Three steel types isn't such an issue if you can cover their weaknesses. Plus they are one of the best types defensively.

Looking like a solid selection Konflict.