I am a fan of the vast array of horns made by Yoshimura Laboratories (YL) when coupled to their compression drivers. They made metal horns, wood horns and some kind of resin; the horns come in all sorts of shapes and sizes, including horns almost the size of Western Electric 15A horns. But regardless of shape and size and configuration of the throat, they are consistently free of gross horn coloration—not nasal sounding nor shouty—and they sound smooth and relaxed (no sharp peaks).
I also like a number of Western Electric horns and compression drivers. Some that sound good to me, like the 15A, are not very practical, but horns like the 32A, are nice sounding compact horns. I also like Western Electric compression drivers and the currently manufactured replicas by G.I.P. Laboratories.
My own horns are Western Electric 12025 sectoral horns driven by Western Electric 713b drivers. Those drivers are very hard to find in matched pairs. My horns are metallic, but I have left them untreated. They are relatively compact but they are very heavy and the thick metal does not ring much.