I don't really see how you can have a guy with 1 season under his belt in your top 5 Seattle Athletes.... At least Sherman has been All-Pro....
Here is my list... I was born in the area in 1980 and have followed the Hawks, Sonics (RIP) and Mariners (RIP).... If I was going to do a list of all sports in Seattle I would also include some Huskies like Emtman, Kaufman and Tui, but I will stick to Pro's....
1. Ken Griffey, Jr. - HOF and the absolute baseball Icon of the 90's....
2. Gary Payton - dude had swag before anyone even said the word, #1 trash talker of all time, Sherman isn't even close.
3. Steve Largent - I had his Blue Angel poster on my wall in College.... that was 2003....
4. Edgar Martinez - Hit a grandslam in game 4 of 95 ALDS with me in the building.... probably most clutch seattle pro ever...
5. Randy Johnson - He was the most intimidating force in baseball... just look at Kruk in the All-Star game...
6. Nate McMillan - Not only was he a great Sonic on all those excellent teams of the 90's... he also was a very good Coach.
It is hard to leave off guys like Cortez Kennedy, Walter Jones, Kenny Easley (short career), Matt Hasselback, Felix Hernandez, Shawn Kemp, Xavier McDaniel, Detlef (charity work along with being a Husky comes into play)..... I would almost include Shaun Alexander on the list, but he tended to whine a bit for my liking despite his outstanding production for that 5-6 year stretch (1400+ and 14 Tds per year!)
It doesn't surprise me to not see Ichiro on many lists.... dude was a non-factor in the community outside of being in RF at Safeco and in a commercial every year.... I saw him once at a Sonics game the first season he was here....