Well its pretty rare for me to see a Junkrat in masters but…
Orisa:
Fortify
Place sheild down
Roadhog :
Take a breather
Zayra :
Bubble
Rine :
Sheild (keep it down and raise it when its about to blow)
Wrecking ball :
Probably moving fast enough to avoid it.
Winston, Dva & Sig? Eh.
Bapt :
Field
Moria :
Fade
I dont think Lucio and Zen Zen ults save you?
Reaper :
Fade
Mei :
Iceblock
Tracer / Widow / Sombra :
You should be away from your team anyway.
Solider :
His ult targets it.
Sym / Trob :
Turrets target it?
And I know you said not to mention shoot at it but, come on now its 100 health. The lowest healthed thing in the entire game. 1 hanzo arrow kills it.