The most iconic dub is the Ghost stories dub - the godfather of abridge series.
As for iconic dubs in Bulgarian, well we actually don't have many dubbed animes, but I have this tradition of rewatching FMA and FMAB every year, and one of the first times I watched 2003 dubbed, while 2009 subbed,I felt weird because the homunculuses names were translated and the voice acting was kinda of lazy, like the Mustang unit (besides Mustang and Hawkeye) was probably one guy just making different voices.
A scene that stayed with me is when Edd saw his dad flirting with Maria Ross, the used words, made me imagine him in a full traditional folk clothing on the megdan (city squere)and a rose /zdravec / peony behind his ear.