I use Sycamore a lot - it can be great
My Amber Gunslinger (now sold) had a sycamore body and sounded great in a George Lynch kind of way
I will happily use it for Les Paul fronts as well - it is similar to the broad leaf maple that PRS and Hamer use, but different from the Northern Maple that Gibson used in the 50s (which was local to the Michigan plant in Kalamazoo
English Ash is nice but can be heavy and a bit treble biased
Walnut again is very usable, as are a lot of the woods that used to grow in the UK
Some are too dense to be comfortable weight-wise