誰

who

anyone

everyone

to anyone

anyone

someone

(not) a single person

(not) anyone

whichever person (indefinite pronoun)

anyone can see that

dawn

as anyone can see

nobody knows

who benefits (from that)?

challenging (an unknown person)

more than anybody

to whomever

this or that person

everyone

irrespective of the person concerned

anyone and everyone

for whom

For Whom the Bell Tolls (1940 novel by Ernest Hemingway)

a certain someone

everyone

so-and-so

whoever

everyone

a certain someone

none other than

who the heck

anyone

anyone

to no one in particular

nice!

whose

And Then There Were None (1938 novel by Agatha Christie)