It sounds like I had a similar experience as you, I'm also 6'4". I had the largest Aeron and it was terrible, especially the hard plastic sides that pressed/cut into my outer thighs. The seat hurt after an hour or two without any real support under, and there was just no configuration that could be done to make any of it comfortable.
I'm not really capable of not-manspreading in order to minimize the Aeron seat side lip pain so one day I brought a belt to the office to tie my legs together so I could relax ... which helped but was just as ridiculous as it sounds. So I just went and bought my own chair instead for my home office and never went back to the office again.
Thanks for mentioning the Titan, it looks like my next chair!
You described my experience perfectly. I too have big thighs that make it hard to sit with my legs pressed together. 20 years of mountain biking will do that. Also I have some organs ther ethat make it hard to do that too.
I accidentally got th eOmega first, and it hasweird hard plastic in the seat at the sides that also pressed into my thighs, so I went for the Titan. No regrets. I got the cloth ones, not the fake leather. In my experience fake leather peels in 2 years.
I'm not really capable of not-manspreading in order to minimize the Aeron seat side lip pain so one day I brought a belt to the office to tie my legs together so I could relax ... which helped but was just as ridiculous as it sounds. So I just went and bought my own chair instead for my home office and never went back to the office again.
Thanks for mentioning the Titan, it looks like my next chair!