Yes! In my list I forgot Heretic 2, if we don't consider later mods, that can make many games with scalable engines look good even for modern standards, see for example Morrowind, that was already really gorgeous, even compared to most of the other games using the Quake 2 engine. Unreal was gorgeous too, but it had the advantage of using a more recent engine. Heretic 2 OTOH achieved results as good using a tweaked Quake 2 engine, the first time I played it, it made my jaw drop even comparing it to Quake 2 that still was one of the best. It's use of lighting to create atmosphere is still one of the best I've ever seen.
In terms of the actual game, yeah, I was slightly disappointed by Hexen 2. I just think Hexen (the high water mark of the series, imo) was a hard game to top. And yeah, Hexen 2 used the Quake 1 engine.