The predominant credit through multiple eras appears to be special sound.
Talk about it here.
Behold a list of persons who have provided special sounds for Doctor Who:
- Brian Hodgson - An Unearthly Child to The Sea Devils; Carnival of Monsters
- Dick Mills - TV: The Mutants to The Three Doctors; Frontier in Space to Terror of the Zygons; Pyramids of Mars to Image of the Fendahl; Underworld to The Pirate Planet; The Androids of Tara to Survival
- Peter Howell - Planet of Evil
- Paddy Kingsland - The Sun Makers
- Liz Parker - The Stones of Blood