Focusrite Compounder, Drawmer 241, SPL DynaMaxx, RNC (stereo only), Ashly CLX, Klark Teknik DN500, dbx 160/166, BSS 402, Aphex Compellor, Symetrix (used to make some) ...
I've used many of these, not all. A variety of sounds, nothing extreme, mostly good solid quality. Personally I love Klark Teknik equipment of all kinds, and similar Drawmer/Focusrite compressors have been very good for my needs. Ashly is a straightforward company still run by musicians, with quality products made in USA. RNC of course can fit many places. dbx and BSS with long histories of dynamics processors. Aphex has many fans, SPL very easy to use, good feel.
I agree the 1968 is great and that is what I mostly use now, but some of these others can still contribute in places, for less cost.
Steve