whoever

[azz]

Can one use
a. Whoever you manage to hire, your business will fail.
instead of
No matter who you manage to hire, your business will fail.
?

Can one use
b. Whatever unpleasant facts Jane learns about her criminal dad, she'll always remember him as a loving father.
instead of
No matter what unpleasant facts Jane learns about her criminal dad, she'll always remember him as a loving father.
?

Can one use
c. Everybody knows you in the country. Wherever you go, you will always encounter the same friendly attitude.
instead of
Everybody knows you in the country. No matter where you go, you will always encounter the same friendly attitude.
?


Many thanks

[Bobinwales]

I can't see anything wrong with any of those.

[Phil White]

I can't see anything wrong with Bob's answer.

[Erik_Kowal]

I can't see anything wrong with Phil's answer.