It's strange because each of these beings have odd stips on their powers.
I think MJJ can't function in "unspace", where there is nothing to manipulate. He had trouble with The Fury who was able to rearrange itself every time MJJ tried messing with it's form.
Molecule Man had a bad showing vs Sentry but even before that vs Aaron the Rogue Watcher. He trapped MM in a prison where there were no molecules to manipulate and that was the end of that.
The Spectre can take this if he has backing. Without it, I'm not sure he's on the other two's level power wise. Between MM and MJJ, I'll go with MJJ. They actually had to destroy an entire universe to get rid of a WEAKER version of him!
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
Are you just trolling now? Or are you really so misinformed on these characters that you, for some reason, think the Spectre, at his most powerful shown on panel without any external amps, can defeat pre-retcon Molecule Man and James Jaspers?