Ideal 5 stack agents

Title says it. What would be your Ideal 5 stack team to play with & why.

1. For my pick I'd take ISO : for his double tap, undercut & ultimate being in my opinion the best abilities for fraggers.
2. Sage : for heals & resurrect ( I suck & play low ranks so 1 shot kills are rare )
3. KAY/0 : takes away your abilities, flashes last a fuck ton
4. Harbor : His water abilities slow the pace of pushes on attack & defense.
5. Breach : All his abilities are annoying on the receiving end.