If you want the absolute 'grippiest' soles try rock climbing boots. You can literally friction climb up vertical glass with them as long as you can find firm enough hand holds to keep from 'peeling off' the wall. Such boots are meant only for climbing and are less than useless for hiking or normal use because they very painfully distort and compress the feet.

Except for their virtues keeping people from sliding off cliffs they would be listed as torture devices and banned under international law. They work best when grossly undersized and tied so tight that they qualify as a specialized form of sadomasochism. In the the right size properly tied makes Chinese foot binding seem like a kindness.

That and the rubber used is very soft and thin. After a few hours of use the rubber wears off and the canvas stretches which makes them more comfortable but less useful for climbing.

Boating boots designed for wet decks are good on wet steel but most lack the steel arch support that makes climbing on narrow steel and scaffolding easier on the feet.

Building scaffolding I used USGI jungle boots tied tight. If, when, they glazed over because of wear polishing or oil I would scuff the soles up on rough concrete.

Others have had good results with various brands of tennis or running shoes. The guy I worked with most used Converse high-tops and claimed they gripped the steel as long as he didn't step in any oil. They lacked any arch support and would have my feet hurting in a few hours but he was young and tough.