Akame ga Kill!, Rokka no Yuusha Recommendations
I think it's similar because it has allot of characters in it with different weapons and powers and that they have something important that they have to do together.
Adlet Meyer arrived in the capital in the same fashion as our MC. He was wrongly imprisoned, but he was saved by a princess who follows him in the journey to defeat Demon King who is similar antagonist like in AmK. But he finds himself in a strange situation because there are 7 Heroes when there could only be 6. They must find the impostor and continue on their quest.
-Both main characters prove their strong skill for fighting in the first episode and end up joining a group of fighters that fight for good in their world.
-Both of these anime take place in a fairly old period of time long before any technology was invented.
-In both groups each character has there own specific skill used in fighting.
#both animes have organizations/teams that fight together
#both mc's have had a hard time to deal with problems
#both mc's have people close to them die
#both of them have special weapons