I had pretty amazing results with UVR5 on a stealth DPA 4060 AB omni recording, old Buzzcocks show with many various people yelling in my ear.
It did a better separation between music and vocal without leaving holes in the music as RX10 did in places. (I haven't tried the same split in RX11)
Then I split the vocal with MDX-Net Karaoke 2.
The vocal splits made fairly random tracks with vocal parts jumping from one track to the other, and some things that it turned into semi garbled separations that sound normal together.
In some cases, perfectly clean separation of a close loud talker.
In others, judicious muting of various sections of the parallel parts got the talker out, or mostly out. Some edits that used both parts of the split needed one part gain boosted to match, if it was a harmonically partial split section.
One bonus was that I rarely had to mute both in the same spot, so the little bit of bleed ambience from other things doesn't go away as unnaturally as muting a single vocal would do. Artifact of the process, but useful.
It took the number of things I'd be trying to draw out in RX from something like 40 to 6, and of those some were best edited on one of the splits, others on both, others on the unsplit vocal. Cut my workload considerably and allowed some edits I couldn't do with RX alone.
in the model downloads you'll find "MDX-Net Karaoke 2 Crowd HQ 1" which then shows options for "Crowd Only" and "No Crowd only" Promising! It did indeed work, though there are occasional pieces of the vocal that are also gone if you hit mute. You can definitely drop it -6dB for some real improvement.
What seems lacking is any set of descriptions for the numerous models - at least I can't find it if it exists.