For me, Larry Walker is on the fence as a HOFer...not 100% sure I'd vote or him.
Obviously, he spent the majority and best ten years of his career with Colorodo. His numbers were just way way better in Coors then elsewhere. The question is, how much credit do you give Walker for taking advantage of Coors field vs how much credit does Coors field get. Some of the major splits are as follows showing huge advantages at Coors.
Larry Walker during Coors years Home vs Away (age 28 - 37)
BA = .381 vs .281
SA = .723 vs .513
HR = 154 vs 115
RBI = 520 vs 355
RUN = 555 vs 366
Walker certainly has other positives, he was pretty fast and a good base stealer, he walked a lot (his years with Colorado OBA split was .463 vs .386), and he was a very good fielder with a great arm.