Board Thread:Anime/@comment-39492511-20200807001735/@comment-1327106-20200807002852

Someone else. According to Wikipedia, they are:

For AoT 1: Shinichiro Nakamura, Yugen Umemura, and Junya Ishiguro

For AoT 2: Ayako Toyoda and Yugen Umemura

Final Battle does not seem to have separate composers, and since it's DLC for AoT 2, it's probably using the same people.