Answer
Yes, Fritz Leiber did influence present fantasy writers. His work has been praised by many authors including Neil Gaiman, Stephen King, George R.R. Martin, and Terry Pratchett. His most famous works include the Fafhrd and the Gray Mouser series, which follows the adventures of two companions in a sword and sorcery world. Leiber's work is known for its rich world building, complex characters, and dark humor.