Devourer, Mechanisaurus Rex, and Classic Thermal Man are incredibly powerful. Thor and Thing couldn't handle the Devourer (actually the entire Egyptian Pantheon couldn't but that's a different story). The Robo T-Rex was only put down by Thor after the Black Knight's Ebony Blade softened it up. Thor beat Thermal Man after a BRUTAL fight.
If it wasn't for Mar-vell on T2, T1 would steamroll them.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.