I don't think I've ever seen anyone post about Rob Reiner on r/movies. Look at this tear he went on in his first 8 years of directing films:
SPINAL TAP (1984) - probably invented the mockumentary genre STAND BY ME (1986) - perhaps the best coming of age film THE PRINCESS BRIDE (1987) - universally beloved and endlessly quotable WHEN HARRY MET SALLY (1989) - considered the greatest rom-com of all time MISERY (1990) - one of the best King adaptations and won Kathy Bates an Oscar A FEW GOOD MEN (1992) - one of the best courtroom dramas, nominated for Best Picture, and put Aaron Sorkin on the map
I think Reiner is one of the best directors of actors ever -- his films are full of outstanding performances and memorable moments: "You can't handle the truth", "My name is Inigo Montoya...", "This one goes to eleven", "I'll have what she's having."
Why do you think he's not discussed as one of the greats?