Make a lineup of JLA members that could best fight EVENLY with the Avengers. I'm not looking for a team that could stomp them or even a term that could beat them most of the time. Put together a team that has the closest to a 50/50 chance against them as you can.
The Avengers are ...
Captain America
Ironman
Thor
Hulk
Hank Pym
Wasp
Scarlet Witch
Quicksilver
Vision
Hawkeye
Black Panther
What's the best match you can come up with?