Not even a question? I found that to be a bold claim, so i looked into all of your listed guys a bit and made my own ranking. Note that some of the guys you list are #3 at best on their teams going into 2020:
Curtis Samuel (CAR) behind DJ Moore, Robby Anderson
Adam Humphries (TEN) behind AJ Brown, Corey Davis
Marqise Lee (JAC) behind DJ Chark, Dede Westbrook, Chris Conley?
Allen Lazard (GB) behind Adams, Valdes-Scantling
Paris Campbell (IND) behind Hilton, Pascal)
Others are technically #1 WRs now:
Stefon Diggs (BUF)
Jamison Crowder (NYJ)
Will Fuller (HOU) pending an acquisition
Deebo Samuel (SF) pending an acquisition
Still i'd rank the following ahead of Kirk "without a question" based on significantly higher production the last 1-2 years:
Chris Godwin (TB)
Calvin Ridley (ATL)
Robert Woods (LAR)
Jarvis Landry (CLE)
DK Metcalf (SEA)
Mike Williams (LAC)
Robby Anderson (CAR)
Sterling Shepard (NYG)
Michael Gallup (DAL)
That would put Kirk at #10, but then consider the following "arguably" better:
Marvin Jones (DET) - entering his 9th year, also a bit injury prone, but had more yards per game and WAY more TDs than Kirk
DeSean Jackson (PHI) (!) - entering his 13th year, injury prone, but had WAY more yards per game and TDs than Kirk - surely will be relegated to #3 by an acquisition
Cole Beasley (BUF) - entering his 9th year, comparable stats to Kirk, though he accumulated them as a #1 WR last season
Tyler Boyd (CIN) - inconsistent, but had WAY more yards and TDs than Kirk, though he was effectively a #1 much of the last two seasons
Preston Williams (MIA) - only played 8 games, but had similar yards/game and more TDs/game than Kirk
If you rank a couple of those guys ahead of Kirk, he's still top-15 for a #2, not bad.
I thought the following guys were close, but probably behind Kirk:
Sammy Watkins (KC) - similar stats, but on a much better team
Kenny Stills (HOU) - the new #2, racked up similar stats to Kirk playing as a #2/#3
Breshad Perriman (NYJ) - the new #2, racked up decent stats as a #3
Dede Westbrook (JAC)
Corey Davis (TEN)
The rest are clearly well behind Kirk.
Bottom line: I'd say there's "no question" Kirk's in the top half of the league, and if you argue he's top 10 i won't argue against you, but it's borderline.
...dave