I'll put a shout out for ADS speakers. At least the classic "L" lines. I've had a bunch of these, with (so far) my all around favorite being the L710 which is a largish bookshelf/standmount. Three way, with dual 7" woofer, the 2" sticky dome mid, and 3/4" dome tweeter. They are right on the edge where they benefit a lot from a sub. Other models I've liked are L1290 and L990. I like less the two way models, though I have a pair of L400 mentioned above, which when paired with a sub and some hi quality parametric EQ can sound phenomenal. I think the two ways with 8" woofers have a harder time crossing over, and can sound distorted around crossover point.
A major caveat, all the ADS tweeters (and the 1.5" midrange) are ferrofluid cooled, and sound harsh unless rebuilt. There's a tech in AZ (Richard So) who worked at ADS who has original driver parts and can rebuild many of these drivers back to factory spec, and sound is significantly improved, including the woofers. I don't know if this is generally true of old drivers or not. But if you find some in good shape, they can still sound good as is.
They made a lot of models, and while most of them sound good, I have my favorites.
On systems where I can, I run with a high quality parametric EQ, and this can help a lot, as they can have annoying resonances. When properly EQ'd they smoke most modern speakers at a comparable level IMO.
Edit, while basic tone controls, or even graphic EQ can help, a fully parametric EQ will get you a lot farther if you are comfortable with using these...it allows you to make notches of various Q and depth at any frequency, along with broader tone adjustments...I use a DSP plugin running on a Mac which has a very high quality linear phase setting, so it's very transparent and doesn't introduce more distortion, the one I like best for this is made by Fab Filter, these are marketed as pro audio plugins, so you need some kind of DSP host. But really any fully parametric EQ can do wonders on vintage speakers, which have their virtues but which often have lumpy frequency response. That's one area where modern speakers have improved dramatically, much more consistent FR. However, I find modern speakers deficient in other ways, generalizing very broadly.