If I were to write a book about a superhero team, I'd have,
The Leader- The one with the plan and the teacher. They're a goody two-shoes who tries to carry the weight of the world on their back and has trouble sharing their pain with others because they feel like doing so would make them a burden.
The Telepath/The Empath- The heart of the group that keeps everyone together. This one would be a pushover and overly naive.
The Shapeshifter- The one that completes stealth missions. I see this one as the comedic relief. I always wanted to see a shapeshifter that has amnesia and forgot what they look like and is desperately trying to find out who they are by shape-shifting into different people everyday. Sorta like Roger from American Dad and his costumes. This person doesn't know their name so the others just call them "Doe".
The Hacker- The tech genius that helps the team with technology. I seen too many goofy tech characters as the comedic relief. I know this isn't new either but it fits the hacker role the best in my opinion. I see this one as the quiet yet dangerous one of the group. Kinda like Raven from Teen Titans. I'd make this one the mysterious one also. No one in the group knows what they look like because they only speak through technology. So like them texting the others with info.
The Brawn- The one that does the heavy lifting. They're gonna be the classic jock. Relatively unintelligent and unenlightened, but nonetheless socially and physically well-endowed. I'll say this one isn't really a fan of being a superhero that much. They'll help when they can but they prefer their normal life over the hero life. Maybe a college student who is still trying to figure out what they want to do in life.
You're free to use these ideas if you want.