Loved the 6502. I knew the design team headed by Chuck Peddle. Used it in 1974 on the Jolt , Super Jolt series, and later on the SYM. Had shipped over 5000 boards with 6502 before Apple, or Steve Woz, decided to use it. I would definitely vote the 6502 as the most influencial in the early days. Intel struggled. Intel could not sell it's 4004, 8008 series because existing product logic designers did not know how to programming. They hired me, my partner Manny Lemas, and Gary Kildahl of Digital Research to travel the country teaching 4004, 8008, and 8080 basic programming. Gary taught his PL/M. This started the "explosion" of micro chip computers by Intel.