And most importantly, example(s) of their symbolism.

Main Entry: sym·bol·ism
Pronunciation: \ˈsim-bə-ˌli-zəm\
Function: noun
Date: 1654
1: the art or practice of using symbols especially by investing things with a symbolic meaning or by expressing the invisible or intangible by means of visible or sensuous representations: as a: artistic imitation or invention that is a method of revealing or suggesting immaterial, ideal, or otherwise intangible truth or states b: the use of conventional or traditional signs in the representation of divine beings and spirits.

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So?

Here's a few..

Led Zeppelin

the Zoso was chosen by Jimmy Page..
3 more symbols were chosen by other band members.



Rolling Stones

Automatic association

Queensryche

I'm not sure if Stevie Wonder is classified as a "symbolist" but his music sure gives signs of symbolism.