Here is my list.
Top Tier General Purpose
Sunlu/Jayo
Polymaker/Overture
Mid Tier General Purpose
eSun
Bambu
Special Esthetics
Ziro
Amolen
iSanmate
IEMAI
One-offs
Gizmodorks - Fluorescent PLA
iSANGHU - rainbow ASA & marble ASA
yxpolyer/Silver - PPS
ttyt3d/mika3d/bblife - rainbows
Creality - a few rainbows
Eryone - My top Marble. rainbows & titaniums
R3D - bi/tricolors
3dhojor - unique matte pastel rainbows
Sovol - just the matte twister
Flashforge - burnt titanium (honorable mention)
Elegoo - rapid PLA in 5KG spools
BASF - BVOH
Siraya Tech - engineering filaments
Very special cases - these are not recommendations
Stronghero - hard to print exotic freaky stuff
Yousu - has some freaky unicorn s— like stronghero
On my radar - not recommendations
Lovoon
Hello3D
Chitu (Conjure)
Tecsonar
Things I don’t buy on even on sale
Atraxia Art
Reprapper
I’ll buy other filaments to try, but these are the only filaments I keep buying. Inland should be on this list and I’ve got all of their filaments in my tracking system, but I just buy their underlying esun/polymaker variant if I’m buying online. Don’t be afraid of Inland if you live near Microcenter.
About me: I am not an industrial user but I do move my filament on pallets.