Well, it depends
However, you didn’t say what are you using these for, but however, Tyranitor for Singles and Colossaol for doubles.
Tyranitor has a bunch of weakness(7), and 4x by fighting.
But it’s powerful stat let it be too overpowered, and unstoppable with dragon dance.Its ability sand stream can also be useful with a sand rush exadril, which really make it powerful in single.
Coalossal is another over powered Pokemon with awful strong ability—steam engine. It’s works very well with aqua jet in double when one of your Pokemon has it, which active steam engine that let it’s speed went to the highest and if you use weakness policy on this Pokemon, it’s kinda..power house.
So just asking what forming ur playing, hope it help!
(p.s. the last answer do not get upvote so I post this answer)