It's harder to know for the guys who "lived and died" out west like Moose Johnson. We should try to dig into whatever playoff record exists for Moose and Lester, though I don't seem to recall Moose's PCHA teams being all that successful. Zero clue on Lester's playing career, but he must have played the eastern teams at some point, right?
They both spent time out east; before going west Johnson as a LW (as of 1907; I know he switches to D at some point, but I haven't gotten there yet), Patrick splitting time at cover and rover (though his highest praise- for his time in the ECAHA- was at rover).
Johnson interests me because he reads as a good-not-great winger while in the CAHL/ECAHA (through 1907, at least, so 4 years)- he works hard, and is noticeable, but he's not one of the top level stars- but then he goes west and goes down in history as a HoF level dman. What happened there?
Patrick was definitely a star, and reads as one of the best players, if not the best player, for the two years he played on those Wanderer teams (in my opinion, of course). His rushes are noted, his leadership, etc. He was a well-known player before he went west.
Lester Patrick showed up big in the playoff series against Ottawa in 1906, so he has that going for him-
The Montreal Star, 19 March 1906 page 2
“... and had it not been for the brilliant individual work of Patrick the Stanley Cup would have remained in the Capital. Patrick and not the Wanderer's team as a combination took it away. Not only was he the best man on his own side, but he ranked with the Harvey Pulford as the most brilliant player upon the ice. The statement perhaps requires a little explanation. Harry Smith might be described as the most brilliant and effect of the Ottawa forwards, but he was aided by the grand work of his brother, McGee, and Westwick, while Patrick was practically alone. He had to initiate everything good. In fact, as compared with their display in Montreal, the Wanderer forwards played like second-raters and it was up to Patrick to rally the line. He did it, and it was he who was responsible for the goals which gave the Wanderers the Stanley Cup. There is no better stickhandler in Canada and no one played a purer, cleaner game. His work as rover was remarkable, and he has many admirers in the Capital”
“Patrick on each occasion. It was a masterly stroke, the genius of a general that told. Here was a team beaten as badly as a team could possibly be, outplayed at every point except for goal, and Patrick among the forwards, and that forward arranging to get the puck passed to him whenever possible, and, single-handed, taking the Stanley Cup away to Montreal. Ottawa sports could not grudge it. It was the acme of good hockey”