While I don't consider it trash myself, the Parker series by Richard Stark (Pseudonym of Donald Westlake) is really great, hardboiled, and at times darkly funny, and pretty damn pulpy. It's not fantasy, but it's good. Each book follows a heist from beginning to end, usually planned out by the series protagonist, Parker, who is a serious professional, and pretty goddamn great. They also have a unique cast of characters for the other people on the heist, and you can easily see this as RPG party. To a lesser extent, the Alan Grofield books, which spun off from Parker, are also good, but are different in tone since the Protagonist is more Roguish and each book, save the last, has him getting caught up in international intrigue.
The Dortmunder books, by the same author under his real name (Donald Westlake) is also good, but it's almost the opposite of Parker in terms of Tone. They also follow a professional, serious, Thief, but he's usually surrounded by lunatics and all of his jobs go wrong, and they're hilarious. The first book, The Hot Rock, has him and his crew (Which is ever changing from job to job, like Parker) stealing the same gem three times in three different locations because they keep stealing and losing it. Dortmunder also isn't as calm and collected as Parker and is very much an underdog before the deck gets stacked against him.
You also might as well throw some Harlan Ellison in there. Vic and Blood, Delusions for a Dragon Slayer, I Have No Mouth But I Must Scream, etc, are all well worth the read.
You should also try out "Who Goes There?" by John W. Campbell. It's what The Thing From Another World and John Carpenter's The Thing are baed on.
Some of Philip K. Dick's works are pretty pulpy. Check out The Hanging Stranger, Second Variety, The Skull, Total Recall, The Variable Man, and Minority Report. Total Recall is actually pretty comedic, and Minority Report is totally different from the movie adaptation and so much better.
