Fearless Vampire Killers has incredible images, like an insane dream one might have after viewing too many Hammer films. I think he was maybe trying to do an homage to Hammer, somewhat like Tim Burton doing one with Sleepy Hollow. Polanski is one of the greatest of all filmmakers for both the visual and psychological.
For another example - have you seen "The Tenant" ? That film is the most alarming and intimate portrait of schizophrenic experience - first person point of view. Some of the images get into your brain in the worst way - like Roman (who plays the main part brilliantly) seeing his double across the sleazy apartment courtyard at night observing him with binoculars, the hallucinations at the end which include a bouncing ball that turns into a head, the ghost of a suicidal woman trying to turn him into herself, etc. And of course - what a tremendous music score! It is by Phillippe Sarde and has a similarly haunting, melancholy and eerie quality with great orchestrations including some really fine clarinet solos.