As I linked just a few days before in How do we know what early English Kings looked like?, the illustrations of King Aethelstan and Cnut are all we have as those depicted in their (near) lifetime before Norman Conquest except for the highly styled figure on the coin.

The main point is whether the ornaments on the Cnut's crown illustrated in Liber Vitae of New Minster can be regarded as fleur-de-lis, and, optionally, whether any English king prior to Cnut could employ fleur-de-lis motif since a few (imitation?) coins minted by name of Cnut in Signuna, now Sweden, also have a carving of scepter with possible fleur-de-lis motif, which was rare in contemporary Northern Europe (Lagerquist and Dolley 1961). In other words, the fleur-de-lis motif of Cnut's crown could perhaps not primarily followed the preceding Anglo-Saxon tradition.

At least for OP's original question (any monarch prior to Norman Conquest.....), however, I suppose I can answer with 'Probably yes, in case of Cnut the Great'.

Reference:

• Lagerqvist, L. O. & R. H. M. Dolley. 'The problem of the Fleur-de-lis sceptre on the Sigtuna coins of Cnut'. British Numismatic Journal XXX (1961): 252-61.