I distinguish between cheating by using drugs, and cheating with emory boards and spitters. I think that drug-using cheaters should never get in, regardless of their early career success.
I'm a huge fan of Jim Kaat. Not only did he win more than 280 games by changing his pitching style over the years, but he won (IIRC) over ten consecutive Gold Gloves. When someone of any position wins ten consecutive Gold Gloves, I think that he belongs in the HOF.
And speaking of fielders, in my book there's has never been a better fielding first baseman than Vic Power!