Fiddlesticks his lore

I am a big big big fan of fiddlesticks hes like so amazingly epic and i just love his whole concept, but my main problem is, there is so very little things known about him like what is he where does he come from etc etc

i would love to hear some things of him and also the thing i want to know the most: how powerfull lorewise is he compared to creatures like aurelion sol or nocturne or bard or even kindred and the shadow isles