I've deliberately avoided pedals due to co$t. By the time someone outfits a large, comprehensive pedal board they're got something as expensive as a used Axe FX and probably not nearly as tweakable in as small a footprint.
In pedals, what was meant as an inexpensive alternative to a tube amp has become a collector's obsession.
Pedals are a lot like the craft beer industry as well in that one company invented a "Budweiser" back in the days of yore but now everyone else is trying revivals, new spins on it. Etc. "Budweiser, but now with lemon, made by craft brewer X who used to work in Budweiser in 1985 and has the secret recipe in his basement!"
Scanning the post I didn't see anyone bring up Maxon's offerings as the original builder of the Tube Screamer for Ibanez. Ibby vs. Maxon pedals has got to be one of those "Who builds the REAL Dime pickup?" type of discussions.
My use for pedals has mainly been in front of amps.
I'll bring two usual suspects: the Tube Screamer and Boss HM2.
Tube Screamers seem to have a rich, complex, cascading midrange that is in Plexi territory--great for Southern rock and such. Emulated in software I can get death metal from a JCM800 with them.
But on the real things I don't like how the clean channel sometimes interferes with the distortion and makes things mushy. But, a Tube Screamered clean sound was that dirty, elusive third channel amp designers had been seeking between clean and distorted and began to put routinely on flagship amps by the late 90s and 00s. I'd rather gently boost an amp's distorted channel than try to boost an amp's clean channel with exaggerated pedal settings.
The HM2 is a much more properly called a distortion pedal than the Tube Screamer, I think. Lots of videos can be found for it online.
That said, most pedals I had experience with in the 90s were then-common DOD pedals. Like Alesis and other products in their price range, I'm not sure they were the best specimens. They soured my ear on basically all pedals because they would release some gimmicky marketed thing like a death metal distortion that didn't sound at all like what it was supposed to be emulating.
JHS pedals on YouTube usually has a good rundown of important pedals in history.