H. G. Wells
3 appearances across 3 restored issues — every one readable in full, free.
Amazing Stories, August 1927 — 1927 “The War of the Worlds” · p.422 Read the full issue (107 pages) → 
Amazing Stories, Vol. 3, No. 2 — 1928 “A Story of the Days to Come (Part II)” (serial) · p.134 Read the full issue (100 pages) → 
Amazing Stories — 1928 “A Story of the Days to Come” (serial) · p.8 Read the full issue (99 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.