If all the great illustrators of the pulps, Virgil Finlay has always been my favourite – not just because of the amount of work he did for Weird Tales. I particularly love the special Weirdness that comes with using photo references and the naturalism that tends to come with this to then depict the strange and the properly un-natural, a technique that is on display in quite a few of his pieces.
To my delight, a hero of the Internet has compiled a huge amount of Finlay’s interior illustrations for the Internet Archive. The works are properly sorted and can be found following this link.
(Found here on the blog of John Coulthart, who is another favourite artist of the Weird).