Bruce Wolfe, with an "e" at the end. Yeah, it's a great, classic poster, and I'd love to see more stuff by him as well.
The two most famous posters for Raiders were both by the late, great Richard Amsel, who also did posters for The Dark Crystal and Mad Max Beyond Thunderdome, among others.
Drew Struzan, the artist who eventually became "the" Indy artist, also did a Raiders poster, but the artwork was originally used only on some of the non-US posters. It eventually was reused for a 1991 Raiders 10th anniversary one-sheet (not for an actual theatrical reissue but produced just as a collector's item, by a now-defunct company called Kilian Enterprises). He subsequently did the artwork used on the ToD style "B" domestic one-sheet and a lot of the foreign one-sheets, and subsequently used for most of the various video releases over the years. He then did both the teaser one-sheet art for Last Crusade (this is the art used in the upper corner of most of the packaging for the various items of Indy merchandise that have come out in the last year, and is also used on the back of the box of the 2003 DVD set) as well as the release poster for the movie, and from there he did poster / cover / package artwork for seemingly every Indy-related project that came down the pike - I can think of over three dozen different pieces artwork by Drew Struzan (either by himself or in collaboration with another artist) that have been used for various Indy-related ventures...