I disagree, obviously.
The battle in Phantom Menace was so good, if you made a list of the top ten saber battles, it would be the top eight on the list. Number nine would be Empire, and ten would be Revenge of the Sith. Return would get an honorable mention. I should probably slide Yoda in there somewhere but I know a lot of people hated Tasmanian Devil Yoda (I thought it was awesome).
If all you're considering is the emotional resonance, the list changes. Empire is number one, Phantom Menace is number two, Return is three, and the rest don't matter. The choreography in all the original trilogy fights is pretty lame, but as a result there is far more emphasis on story. This is coming from someone who saw all the original movies as a child in their original run. I went home after seeing Star Wars at nine years old having watched it twice and played Jedi with sticks with my little brother.
But I'm also someone who grew up playing all the games. Reading all the novels (including the one before Empire where Luke kills Vader and fucks Leia). I will watch literally anything with Jedi in it, because they're pretty fucking cool.
I loved the choreography in the prequels. It was awesome seeing Jedi do things they could only suggest in the first movies but didn't have the film tech to implement (although they tried).
You can't compare Luke vs Vader to anything else. Those two are the entire core of the Star Wars universe, and the only story in that universe that actually matters. When they faced, the stories resolved, because those two are the only ones who really matter. That carries a lot of weight. However, the actual duels weren't that great, for people that actually care about Jedi duels.