In the words of Satele Shan: "You are our greatest warrior... And our best hope."
Herself included. Someone who managed to battle a powerful (though not peak) Malgus evenly and actually put him on his ass. What does that tell you about HoT's prowess as a warrior? Pretty high praise, I'd say. The Knight story revolves around the notion that the main protagonist is a Jedi who mainly focuses on mastery of lightsaber and TK. He certainly kills a good number of powerful Sith throughout the story, Vitiate included. Nothing suggests Maul is as good a combatant as HoT overall, even as deadly and skilled as he is.
Beating Vitiate has nothing to do with his skills as a lightsaber duelist 👆. We have no idea how he faired in a duel with Malgus either, Maul has fought evenly with Mace Windu, fought evenly with General Grievous, beaten Obi Wan Kenobi, killed Jinn and Bondara who were considered two of the greatest Swordsmen produced by the Jedi order, and was considered the most skilled Sith in history compared to Hero beating primarily featless individuals
There is more than enough evidence to suggest HoT is a powerhouse. It's unbelievable to me that you'd say it's very possible for Maul to be more powerful in the Force.
Can you give me any indication why his "power" would mean anything more than the large gap in dueling ability between the two? He was throwing around a weakened Vitiate, apart from that he collapsed Tunnels which Maul has done as well as sending Kenobi flying. People always try to make Hero sound 00ber, when his telekinetic feats aren't much better than Ventress's
As for the match Ventess is superior skillfully to Zallow (though it'd be a good fight), and Darach would lose to either Ventress or Savage who have fought superior opponents to either.