Laver's CYGS has been blown out of proportion. It was the 1st full year of open era. Things were just getting figured out. Players back then didn't travel as much as now. He played only 5 rounds for AO, which had a smaller field of mostly local Australian players.
Novak's record of winning 4 majors in a row, WB 15 to RG 16, is a greater achievement. He also holds the record for most consecutive major matches won (30), which is telling.