Thanks for posting those @digitaldog. After watching them I understand why this is a nonsense.
I made some progress this week. One of the images (looking down the autumn creek in New Hampshire) is in sRGB. My monitor is in Adobe RGB mode. I thought it would be enough to put photoshop in the sRGB working color space because (I reasoned) sRGB is a subset of aRGB. Nope.
I spent a few more hours with this yesterday, the yellowish cast remains. I added another image to the test. It's another of my deep forest greens, and it behaves the same way. I finally got a chance to try brute force by using my colormunki to make a new profile on epson premium luster. Two interesting things happened:
1. The color gamut shown when soft proofing was far smaller
2. There was NO CHANGE to the color cast after printing with the new profile
Finally, I have viewed the image on two additional displays. They are quality manufacturer calibrated displays, though without custom profiles. They look identical to my profiled laptop aRGB display.
I keep hoping that I will find something that leads me away from a problem with the printer. As a matter of fact, the printer is so consistently off, that I feel like it must be something I am doing wrong.
On a possibly related tangent, I ran a head alignment routine on the printer, and it seemed to be way off. Every adjustment line was at the minimum setting of 1 out of 9 when the default appears to be 5. After running it a second time, all the values clustered between 4 and 7. There was a noticeable increase in sharpness (or local contrast) afterward. Could this printer be a sample that is far out of spec?