Yep, ID-11/D-76 is an excellent developer, and if you're happy with it then I think you should stick with it as your main dev. But I can also understand the desire to try others, and I would agree with julio1fer that Rodinal and HC-110 would be worth trying (they're all I ever use these days myself).
Rodinal at 1:50 with slow films like FP4 can give a very traditional look (though I do think it is worth trying with ISO 400 films too - it will emphasise the grain, but the harsh gritty look that results can be good with some subjects).
I'd also suggest HC-110 too - it's probably my favourite developer, and is very versatile. If you use it very dilute (eg dilution H) with very little agitation you get a very strong compensating effect that can render high contrast lighting very nicely indeed (I hadn't thought of it as "the classic photojournalist look", as julio1fer puts it, but I do think that's a good way to describe it).