There is no viable party that is against the military industrial complex.
If you take a step back and look at the Democrats and Republicans, they agree and overlap on far more many issues than they differ. Indeed, in the context of a lot of foreign governments, both of our parties would be considered dangerously right-wing. Yet, there's no serious opposition in the US, as you say.
The issue has been falsely bifurcated in the USA where looking elsewhere is "throwing your vote away". Yet, without an alternative party, there are many problems in the USA which are just non-starters, like pacifism. Totally unthinkable under either party's operational guidelines.