I see Kaiden Guhle as a Derian Hatcher type.
Was Derian Hatcher a #1 in Dallas? Numerical hierarchies don't describe the whole story. Hatcher and Zubov both played a different role on Dallas and played 30 minutes a game in back-to-back trips to the Finals. Zubov was a beast on the PP, Hatcher on the PK. Shea Weber was basically Derian Hatcher but with a bomb from the point so he played the PP (although Hatcher also did as a net man from time to time, but it's not the same thing).
Of course, it's better to have #1D who excels at both special units as well as at even-strength, but they don't grow on trees. Not everyone is Denis Potvin or Doug Harvey or Chris Pronger or Ray Bourque. Even Shea Weber, who excelled as a PP triggerman, wasn't exactly a PPQB, which is the most important role on such a unit.