Murderbot was 2021. I would defend it as a winner, but take a look at other recent years:
* 2020 - A Memory Called Empire by Arkady Martine - a science fiction story set in a future Aztec space empire - quite inventive and odd. The sequel won in 2022.
* 2024 - Some Desperate Glory by Emily Tesh - basically a story about growing up as a terrorist in a sci-fi setting, with some wild turns.
* 2025 - The Tainted Cup by Robert Bennett Jackson - a very bizarre Holmes & Watson take set in a land constantly invaded by sea kaiju, and where there's "magic" (or is it science) based on harvesting the dead kaiju's bodies.
These are all excellent books, each of which has something different to recommend them.
Are they as good as Dune? Well, it's very hard to say _now_. Assuming humans still exist in 60 years, will they still read them like we read Dune 60 years from its publication? Maybe.
Heinlein's Stranger in a Strange Land won in 1961. I've read it, and I don't think it's aged very well. It's certainly not Dune.
How many people are still reading the 1969 winner, John Brunner's Stand on Zanzibar? I _have_ read it. It's good, but nowhere close to Dune. And how about 1978's winner, Gateway by Frederik Pohl? It's ... fine. It's not even in the same category as Dune, IMO.
Dune is an outlier among _all_ winners. It's one of the best SF books of all time, with a voice that still seems fresh today. Most Hugo (and Nebula) just don't live up to this standard. There are a few that do, like Left Hand of Darkness, Ender's Game, Hyperion, and Jonathan Strange & Mr Norrell (better than Dune, IMO). But those are outliers just like Dune.