MCF's COMMON 7

Welcome to MCF's COMMON, the game in which I give you four things, and you tell me what they have in COMMON! How keen is your sense of grouping?

Below I'm going to list FIVE groups of FOUR things. Each group has some common link, some reason for grouping each quartet. It's up to you to guess, and I'll reveal the answers tomorrow.

20 items. 5 COMMON bonds. Can you name them all?

GROUP 1
(A) Ryan.
(B) Taylor.
(C) Willard.
(D) Joker.

GROUP 2
(A) Barker.
(B) Craven.
(C) Argento.
(D) Romero.

GROUP 3
(A) Air.
(B) Water.
(C) Earth.
(D) Fire.

GROUP 4
(A) Michael.
(B) River.
(C) Rain.
(D) Ricki.

GROUP 5
(A) Clutch.
(B) Steeler.
(C) Hawk.
(D) Grand Slam.