I agree with Ian. They are beautiful when you figure them out. Out of the box, they are flat, though. I mostly use the 50. When I tried D-76 1:1 using PL100, I though I could have done with about 1.5x as much development. The shadows were OK, though, in that case, so 100 was actually a decent EI....just too little development. I think I used the times from the Freestyle Website, which were 6 minutes for 25, 7 minutes for 50, and 8 minutes for 100. I might have a mistaken memory, however.
At any rate, I have used HC-110 dilution H (and now Ilford HC) for everything for quite some time now (the most versatile, convenient, and consistent developer I have ever found...and those are the things I want in a developer 90% of the time), so didn't ever do any raw testing with D-76. Just a few unimportant shoots for friends. They turned out fine with printing, but were definitely weak negs out of the box.
At any rate, I see no point in doing a film in so many different developers, but if you really want to get your answer, you will have to just burn some sheets, at least on the basic zone I/VIII testing. You have a densitometer and the film is reasonably priced, so just go for it. If you have it nailed down well with all those other developers, then you know what to do to nail it down with D-76 as well.
One item of note is that I do process this film colder than normal. I do everything else at 75F, but go with 68F for the Efke, no stop bath, and Kodafix (which is a hardening fixer), as opposed to Ilford Rapid Fix (non hardening), which I use for everything else. I tried this film at 75 with stop and non-hardening fix and ruined the edges of several sheets, and had some pinholes from the stop. I think the lower temperature helps prevent damage (although I have no proof of this).
2F/2F