I think this has turned out to be another one of those "the OP should try PanF+, Tmax100, Acros100 and see which they like best themselves, everyone processes different, everyone's eye is different, some look at charts, some look at the final image etc. I seem to be the opposite of the above posters... I like...
Acros100 for contrasty Landscapes.
PanF+ for beautiful light skinned Portraits.
Tmax100 I can't say since I've only used it once on a model but had light piping issues that put strips through the film, though it wasn't particularly sharp nor fine grained and seemed to match Kodak XX, though I pushed it to 200 in Rodinal so that may be why.
Tmax400 I found very sharp and fine grained, but I've been struggling with the exposure part of it for too long and wasted too much money so I won't comment on if it's good or not because I can't decide all I know is it is NOT a 400 speed film, not even close IMNSHO, so perhaps underrating this to 100 and pulling it would actually produce fine grained results with good shadow detail? could be an option.
Again, OP ... just try each and see what's best for you, we all have different likes... oh and if you want a better opinion, post examples of the images YOU MAKE with the old film you're used to, that will help give an idea of the look you like vs. the look we like... which is subjective.