#1 was Phil Tead. Correct on the other two.
DQ: Male?
IQs:
- Did you have a bed that gave new meaning to the phrase “One size fits all”?
- Were you Candide’s learned mentor?
- Were you D’Artagnan’s valet?
IQ1: Do you play bass guitar for the Grateful Dead?
IQ2: Do you play bass guitar for Styx?
IQ3: Do you play bass guitar for Toto?
Good job, guy! Shoulda thought of him.
IQs:
Did you surrender Vicksburg?
Were you a detective in Homicide?
Were you Truman’s political sponsor?
Yes, I’m real and I am not Linus Pauling. Have 2 DQs
I am male.
I am not Planchet or Procrustes. 1 DQ
I am not Mike Porcaro or Phil Lesh. 1 DQ
I am not John Pemberton. 2 DQs
P
- Real
- Male
Correct. Dr. Pangloss. Correct.
DQ: Alive?
IQs:
- Do the Frenchies seek you here and there?
- Are you the protagonist in some stories by P. G. Wodehouse?
- Were you a martyred disciple of the apostle John?
IQ1: Did you play a CIA agent who travelled to Central America with a dentist?
IQ2: Did you and Bruce Woodley write “Red Rubber Ball”?
IQ3: Did you sing “Hot Diggity”?
Jean-Luc Picard (ST:TNG), after the Inner Light, and James K. Polk. You were correct on Pauling, of course.
DQ: Known for the Arts?
1 DQ reserved.
IQ1: Did you write Capital in the 21st Century?
IQ2: Does your son lead a major political party in Canada?
IQ3: Did you (allegedly) search for the fountain of youth?
Chuck Panozzo
DQ: Last name start with P?
Previous IQs:
Did you surrender Vicksburg? - Yes, Pemberton.
Were you a detective in Homicide? - Pembleton.
Were you Truman’s political sponsor? - “Boss” Pendergast.
DQs:
American?
Born since 1950?
IQs:
Did you found Kenyon College?
Were you a U.S. Attorney General of the same first name?
Were you a notorious British double agent of the 20th c.?
IQ1: Are you a Rastafarian recording artist who was killed in 1987 by a gang demanding money?
IQ2: Did you play three different roles in Dr. Strangelove?
IQ3: Are you one of The Monkees?
I am not Psmith. 2 DQs
I am not Paul Simon or Peter Falk. 1 DQ.
Not known for the arts. I am not Thomas Piketty, Juan Ponce de Leon or Pierre Elliot Trudeau. Have a DQ.
First name starts with P!
I am American but not from the United States and I was born before 1950. I am not Kim Philby. Don’t know the other two so 2 DQs.
I am not Peter Sellers or Peter Tosh. Don’t know the Monkees guy so 1 DQ.
P
- Real
- Male
- Not known for the arts
- First name starts with P
- American (continent, not country)
- Born before 1950
Correct on Psmith.
#1 "They seek him here, they seek him there,
The Frenchies seek him everywhere.
Is he from Heaven, is he from Hell?
That damn’d elusive [Scarlet] Pimpernel?
#3 was Polycarp.
DQ: Alive?
1 DQ reserved.
Correct on all three, though strangely the second two are in reverse order from how I asked them. I did have a DQ in reserve, though, so I’ll spend it:
DQ: Known for politics or the military?
IQ1: Did you lead Brazil to multiple World Cups?
IQ2: Did you lead a major drug cartel?
IQ3: Did you write Tau Zero?
Previous IQs:
Did you found Kenyon College? - Philander Chase.
Were you a U.S. Attorney General of the same first name? - Philander Knox.
Were you a notorious British double agent of the 20th c.? - Yes, Kim Philby.
DQs:
U.S. citizen?
Political/military?
IQs:
Did you donate a big New Mexico ranch to the Boy Scouts of America?
Did Tom Hanks play you in a recent movie?
Are you the best-known living person born on Corfu?
Peter Tork for Peter x3!
holding a DQ
Correct on Falk.
Correct on Simon.
Perry Como.
Peter, Paul and Perry! 
DQ: From North or Central America?
IQ1: Was “Theme from A Summer Place” one of your best-known recordings?
IQ2: Was your husband elected president twice before your death, and once afterward?
IQ3: Were you that husband?
I am not Pele, I don’t know who the third one is but it doesn’t matter because I am indeed Pablo Escobar, the Colombian king of cocaine! Congratulations… I should have picked a more difficult one. 
I dunno about that. I’d never have guessed him myself. Good going, Tim!