Confusion in close loop block diagram
The term "feeedback" is used when a portion of the output signal is coupled back to the input. Hence, it is important to verify the input node.

In your circuit, we have two inputs: A reference input v(s) and a disturbance input T(s) and two corresponding transfer functions H1=out/v(s) and H2=out/T(s). 


For H1 the forward gain Hf is the product of all three forward acting blocks with the feedback block Kb.
For H2 the forward gain Hf is only the most right block with a feedback chain consisting of all the remaining three blocks.
The closed-loop gain in both cases is Hf/(1+loop gain). The loop gain is the same in both cases; it is the product of all four transfer functions.