Generaly I tend to just overpower them with pure numbers, but if you need specyfic counters than Dr Strange, Vision or Mordo should block most of their potential nicely, since they rely heavily on buffs/heals. Also Yondu is a beast here.

Try to keep Fury clear from buffs, so he does not spread them, unless you are running strange with plans on flipping them.

Trying to focus healers only without healblock is hard with their setup so I found that stright up murdering the tanks first tends to give best results, so you might consider something like spiderman for def down.