Semi-colons allows multi-crew search
(i.e. "data;spock")
Tiers and comments come from /u/Automaton_2000's work, with his permission.

Crew List

Tier 1

Captive Bashir
2
Fugitive Spock
1

Tier 2

Jodmos
2
Keyla Detmer
1

Tier 3

Desert T'Pol
1
Desperate Riker
1
Indignant Seven
1
Riker Q

Tier 4

Data Q
Grathon Tolar
Jannar
2
Test Pilot Archer
1
The Clown
Young T'Pau
1

Tier 5

Aleek-Om
1
Buck Bokai
2
Miss Q
Obrist
Tholian Prisoner
Vosk
Zora

Tier 7

Prison Break Lorca
Siranna

Tier 8

Ensign Picard

Tier 9

Evil Kirk
Thot Gor
1

Tier 10

Colonel Worf
1
Dr. Leonard McCoy
1
Resolute Chakotay
Tuvix
1

Tier 11

Nexus Guinan
Taresian Kim
The Duras Sisters
Zahl Ambassador
1

Tier 12

Lucien
Q Junior

Tier 13

Fierce Guinan

Tier 14

One Zero
Zero One