Bouncing back from a 12-point defeat to early premiership favourites Hawthorn, the Giants had little trouble swatting away the winless Eagles, winning 20.12 (132) to 7.9 (51) at Engie Stadium on Sunday.
Giants veteran Stephen Coniglio was a late out with a glute complaint, but his absence mattered little for the flag contenders.
Hogan gave Eagles debutant Sandy Brock - nephew of nine-time Bathurst 1000 winner Peter - a baptism of fire as he remarkably converted his first eight majors from eight touches, before equalling his career-best goal haul of nine.
The 30-year-old has kicked 13 goals this season, behind only North Melbourne's Nick Larkey and Adelaide's Riley Thilthorpe (14).
Hogan, who also finished with 10 marks, sprayed an attempted shot at his 10th goal.
GWS coach Adam Kingsley could only laud his star forward.
"He seems to be able to launch and just hang on to marks that not a lot can," Kingsley said.
"Maybe we sort of played at that a little bit too much today, by bombing the ball in a little bit to him, but we have that option."
Darcy Jones (two goals) and Toby Greene (three) also did some heavy lifting alongside Hogan, while defender Sam Taylor kept a short leash on Eagles co-captain Oscar Allen.
Tom Green, as usual, led the way in the Giants' engine room with two goals, 37 disposals and seven clearances.
After a difficult week following the fallout from his meeting with Hawks coach Sam Mitchell, Allen finished with one behind from eight disposals.
Eagles premiership player Jamie Cripps and Jack Williams tried to lift in attack with two goals each.
Andrew McQualter's men remain dead-last in 18th, joined by Melbourne and Carlton as the only teams to have not yet registered a win after four games.
Meanwhile, the Giants - expecting to welcome back Coniglio for their Gather Round fixture against St Kilda - move to fourth with their third win of the season.
"Clearly their class was at a far different level to ours," first-year coach McQualter said.
"Their fundamentals of the game was superior and a real challenge for us all day.
"Their run probably was significant too - they're probably the best running team in the comp and I thought they showed that today."
Jones had burned off West Coast co-captain Liam Duggan to open the scoring after Greene danced around Eagles defender Brady Hough to assist.
Eagles sensation Harley Reid (25 disposals, one clearance) was stationed at half-back for large periods, but the young star struggled to inspire in defence.
The Giants' buffer ballooned out to 51 points in the second quarter after four consecutive centre-bounce goals.
The slaughter continued well into the second half, but debutant Tom Gross provided a highlight for the Eagles on an otherwise difficult day.
After Callum Brown gave away the ball to teammate Cole in the centre square, Gross launched from outside the 50-metre mark to slot his first career goal.
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