Johan was the best the Twins had relative to the rest of the league. There’s a reason why Bert never got much Cy Young consideration (other than being on some low win total teams). Those reasons were mostly Seaver, Carlton, Ryan, Jenkins and others who’s names I’m blanking on. There were a lot of all time great pitchers in Bert’s era. That’s a big part of why it took so long to get him in. He was probably the least accomplished of his peer group. It was just an exceptional group. Kinda like comparing Vince Coleman and Tim Raines with Rickey Hendeseon. Just because Raines and Coleman weren’t as good as Rickey, doesn’t mean they weren’t great.
These do not seem to me like reasons to consider Santana the best Twins pitcher ever.
Just the opposite. I didn't compare Blyleven to the rest of MLB. I compared him to the list of Twins pitchers.
Just because Bert wasn't as good as Seaver doesn't mean he wasn't better than Santana.