I think that ”と” of "といい" means "and"/”also”.
"いい" = "言い".
The meaning of「といい/といい」is a emphasized "and"/"also".
The meaning of "山田さんは、判断力といい、行動力といい" is similar to "(I say) Yamada san's ability of judgment and ability to take actions are (suitable for the leader's).
This is a「なり/なり」's example from this site.
https://jn1et.com/narinari/#toc7
どうせ暇なら、掃除なり洗濯なりしてくれない?
I think that this ”なり” is "or”.