The way I see it
Tier 1: (The Standard)
Mahommes
Tier 2: (Nipping at Tier 1's heels)
Allen, Burrows and Jackson
Tier 3: (On any given Sunday, Monday or Thursday)
Hurts, Stafford, Goff, Smith, Mayfield, Stroud
Tier 4: (Shows Flashes, But...)
Darnold, Daniels, Nix, Prescott, Murray, Herbert, Love, Purdy, Tagovailoa,
Tier 5: (Only Your Own Fan Base Cares)
All the rest..