Personal favourites:
-Sennheiser HD560s: Near perfect out of the box, perfect with minor EQ, as my listening levels are low and distortion in the bass remains low
-Sennheiser HD-25 II: I have used these since I was a teenager and I had to panic buy something for my first monitor mixing gig for a local concert for local bands. I got so used to the sound it's just natural to me and it took a LONG time for my ears to accept anything else. I love them and will never ever part from then. I don't care how they measure and don't want to know. We have seem the world together.
-Bunch of KZ IEMs that really only require a bit of tip rolling to sound absolutely perfect, also depending a bit on the environment and the general mood of the day - tonally they are quite different but that's okay as long as there are no sharp peaks, it's just a flavour thing
-PRX (foam tips or reverse hybrid foam tips)
-ZVX Pro (reverse hybrid foam tips or silicone tips)
-Zenith (bog standard silicone tips)
-Decet (reverse hybrid foam tips)
And the rest:
-Sennheiser EPOS QSP 670 for gamery moments
-Tronsmart Spunky Beat (I love this one completely unrationally, it's really not perfect, but it was like 15€ for TWS buds and it is not horrible and the name makes me giggle)
..also in my drawer are other IEMs I have collectes because Thou Shalt always have something on the way from Aliexpress. I am waiting for my Truthear Gate to arrive as we speak! Most are pretty good, some just okay and only the Juzear is awful.
KZ ZVX, Castor Pro Bass, Castor Pro Harman, Krila, ZS 10 Pro X, Libra X, Libra HiRes, Libra Balanced, Saga Bass, Vader Balanced, Vader HiRes
Moondrop Chu2, 7hz Salnotes X Crinacle Zero 2, Juzear Clear
Various entry level "pro IEMs", mainly Shure 215/315 models. What happens is you forget where you put them drunk on a tour and then you panic buy new ones and find the old ones later.