What is "essential" will likely be very controversial, especially at TC (where everything seems to be controversial).
I might suggest trying for a list of essential works, then worry about what performances later.
I think that is OK, but I don't really see a need to dodge the issue. This is only going to be a problem if people forget why the post is being made in the first place: trying to help, teach and point others along a route. If they use it as an ego exercise, showing how clever and erudite they are, then yes, it won't go anywhere except down the usual bun-fight plug-hole.
I don't think a beginner's guide to getting up to speed with Composer X need become a bun-fight, though. Sure, someone might
really think, "That 1934 electric recording of piece A is essential!", but hopefully, putting ego to one side, they might recognise it as a bit of a ludicrous suggestion for a complete newbie! We'd instead end up with a list of "acceptable" recordings, not "must have, because I adore..."
Maybe I'm too much an optimist, though. The reaction to this thread generally suggests that it's not going to get the buy-in it needs from enthusiasts about composers X, Y and Z...
I suppose we can begin with a fairly safe recommendation for all of Beethoven's symphonies (and can argue about the best complete cycle or collection cobbled together from individual performances).
See, that's a no-no! It's no good saying to a newbie "Listen to everything!". You have to be
selective, distinguishing between "core" and "complete'. I would suggest Symphonies 1, 2 and 4 are nowhere near core (which is not the same thing at all as saying they're no good). I could live with a recommendation for 3, 5, 7... but even then, I think you really want no more than 2 exemplars of a 'genre' for any composer (though exceptions, of course, can be made where necessary). I'd say it would have to be #5, if we got really selective about it!
Also at least Beethoven's piano concertos 4 and 5?
I think those would be fine selections.
For Haydn, at least the London symphonies?
For Mozart, the later symphonies?
All four of Brahms' symphonies.
Any time anyone thinks "all of...", they should stop, because that's not being selective enough. Especially when they're are only four... pick one and make it stand for the others. You're trying to get someone "into" Brahms, at the end of the hook. You can direct them to the other 3 once they're properly hooked
For Bach, what are the "essentials"? Goldberg? Brandenburg?
It's up for debate and for a true Bachian to propose, I think. Personally, I would say St. John, B minor, Goldbergs, Brandbenburg 5, and maybe a concerto and one cantata.
For violin concertos, the Beethoven, Brahms, Tchaikovsky, Bruch 3rd, Mendelssohn?
For piano concertos (in addition to the Beethoven noted), the Tchaikovsky, the Grieg?
For choral works, I suppose Handel's Messiah
Well, this was meant to be 'Building a Library
by Composer', not 'build a thematic library by composition type'. I don't think it helps to do 'Choral Works': what can possibly be 'core' (and hence a gateway) if you pick one or two choral works out of 600 years of choral composing? I don't think a Classical Music newbie comes to the party in any case thinking, "I like choral" or "I like string quartets". They are more likely to say, I think, "I like the tune to that advert I heard the other day... what
else did that guy write?"
Some people might or not not consider any opera to be "essential" or any "ballet" music, depending on whether or not they are fans of those genres.
This is, obviously, just a starting point, and put together somewhat hastily.
Again, it's not about types of compositions. It's about 'if I want to get to grips with Puccini, what should I listen to first?'. If someone's not a fan of opera, they're not going to be a fan of Puccini... so they won't ask the question about him in the first place. But maybe, having listened to a Britten 'core' because of his choral works, they might have appreciated a couple of his operas and thus now fancy listening to some proper 'grand operas' -and at that point, they'd want to know to listen to Tosca and not start with, say, Il Trittico.
Anyway. I appreciate your thoughts, even if I might disagree with some of them. At least they were all constructive!
For
my conception of the idea, and to take Simplicissimus' helpful suggestions earlier about Charles Ives, I
threw this page together. A (very) little bit of biography. A tiny bit of characterisation of the man's output. Then the recommended core works, linked to Youtube performances so you can hear them immediately; and the recommended recordings of them, linked to somewhere you can buy the things. A one-stop shop for someone wanting to get started with Ives, with options for minimal (cash) investment, and other options for full-on commitment of the purchasing kind, too.
Follow the link on that page to 'Back to other composers' and there's 500 potential essays that could be written by one champion or another of any of them.
Maybe it requires too much of a single-editor approach to make it work here. I don't know: I can't see why it wouldn't technically be possible for one contributor to be editor for one (or more) composer's Building a Library pages, so you get strong single-minded shaping of the recommendations, but still open to input from others.