where to begin, there are some real classics.
for universal it has to be lon chaney snr if only for phantom of the opera and the sorely missed london after midnight.(did you know universal still has the original set piece for phantom). chaney just had something the others lacked.
for hammer it has to be jointly chris lee and peter cushing.they made the dracula and frankenstein/van helsing characters their own, and no-one has ever come close to taking it from them. certainly the greatest horror duo.
as for more recent times i find it hard to think of a real horror icon.there have been