I've also found that the CPU speed is the governing factor with Bethesda games. I had a Core i7 and when it died, I actually went with a faster Core i5 and all my Bethesda games run pretty fast now (Oblivion, Skyrim, Fallout 3 & 4). Skyrim and Fallout 4 use the graphics card more than the old ones do, but they still seem to benefit from higher speed.
Core i5-10600K @ 4.10GHz
32 GB RAM
WD Black SN750 SE NVMe SSD
Having a fast SSD for your game files is also key. I have my saves on a traditional drive.