Hartlettt was instrumental in the Power's second half surge, racking up 23 disposals and two goals to go with a game-high seven clearances.
The 22-year-old has moved into second position in the AFLCA Award standings following his 10-vote performance.
Livewire forwards Chad Wingard (six votes) and Jake Neade (two) also received votes while Travis Boak continued his outstanding form with four votes.
Port Adelaide v West Coast - AFLCA Award voting
10 - Hartlett (PA)
6 - Wingard (PA), Shuey (WCE)
4 - Boak (PA)
2 - Neade (PA), Selwood (WCE)
AFLCA Overall leaderboard
35 - Watson (Ess)
30 - Hartlett (PA)
27 - Westhoff (PA)
23 - Selwood (Geel), Taylor (Geel)
22 - Boak (PA)
AFLCA Port Adelaide leaderboard
30 - Hartlett
27 - Westhoff
22 - Boak