Oof... I've some serious egg on my face for not previously mentioning German-Belgian Andreas Martens' weird and wonderful Rork sci-fi character here before. I'm afraid my pitiful excuse in this case is that I simply haven't read much of the material. So far!

"Rork" is a series of 8 GN's about a white-haired wizard-type from another dimension who solves supernatural mysteries, before embarking on a quest to discover his origins. During his quest, he's assisted by a cast of characters including occult detective Raffington, astrologer Capricorn, psychic Deliah, the immortal Yosta, and others. His enemies are the mysterious Pharass & Dahmaloch, revealed to be an analogy for the Devil himself in the later, twin "Capricorne" series. --WP and Johnny

The Rork series is notable for its use of allegory, mysticism, visual sequencing and unusual "dynamic" framing, with a visual structure and rhythm rather uncommon in Euro comics.

Many mysteries explored in the various albums are not revealed until the 7th album and some albums of the twin "Capricorne" series, and even then many enigmas remain unanswered for the reader. --WP

Andreas' LBK entry:
https://www.lambiek.net/artists/a/andreas.htm