Fujichrome / Sensia always was my favourite.
I had an EDDING permanent marker on me always.
Marking the film rolls: 100, 200, 400, 800, 1600.
That film can bare a lot of push processing. And the colour stability is astounding.
The only thing that might suffer ist the saturation.
Sensia100@ISO1600 is still better than Fujichrome800@ISO800
Pushing 4 stops might seem a stretch, but in the case of Fujichrome / Sensia it is not.
Get me a good scanner and I show you 800 and 1600 pushs. Always @f=1.4, FM2, 50mm