It's clear going through contemporary reports that Richard was almost unanimously considered the best player ever in the 1958-1965 time frame. He's spoken of in near religious reverence. The only other examples that come close in hockey history are mid 70s Orr and late 90s Gretzky.
Was Howe the better all time player by 1960? Yes, absolutely. But that was very much not popular opinion.
Now this Richard-Howe situation is absolute interesting when thinking of the shaping the Alltime Top10.
Inspired by this I took a superficial look (i.e not reading any contemporary articles) on Orr, Gretzky and Lemieux entering the Top10 and eventually their current 3rd, 1st and 4th positions. These three players are relatively close (inside 20 years or so) when entering.
Orr:
By the time Orr came into league, G.Howe was pretty clearly 1st Alltime. So when did Orr become a top 10 player and when was he considered 2nd best Alltime? When he won the Art Ross, his 3rd Norris and 1st SC in 1970, was he already considered a TOP10 alltime player even though he only had 4 seasons under his belt?
If not, then surely after the 2nd SC in 1972, with 3 Harts, a second CS and two Norrises later, he was surely in TOP10. But how high? Maybe not generally accepted as 2nd best yet?
Obviously after 1975 when winning his 2nd Art Ross and 8th Norris + Canada Cup MVP, must have cemented his 2nd position behind Gordie Howe, considering how his career went after that.
So the interestng question remains, that between 1972 - 1975, he must have passed couple of players each year in All time list, moving from say 6th to 2nd?
Gretzky:
If Orr entered the Alltime Top 10 after his 4th season, surely the same must be said of Gretzky even if hadn't won the Cup yet by then. But he had 4 Harts and 3 Art Rosses, but where was he ranked at after 82/83 season? Without a Cup, likely not ahead of Orr yet, but who else were still consired to be ahead of him?
Then after 83/84 with the first SC and another Hart and Art Ross, does he go ahead of Orr or not?
After 84/85, with CS to add to his usual trophies won, and with well over 1000 pts, he surely must have been Alltime 2nd by then.
But when did he pass Gordie Howe? Surely during his time in Edmonton, maybe after 1987 with the third SC, second Canada Cup success, another Hart and Art Ross. Although it took until his time at LA to break Howe's goal scoring record.
Mario Lemieux:
Did he enter the Alltime Top 10 before Penguins won the SC's in the early 1990s? Maybe not, he had one Hart and two Art Rosses, but didn't have 1000 pts yet.
So he enters top10 after the Cups, but how high? He probaly gets the 4th spot after 95/96 season, with his 3rd Hart and 5th Art Ross. So between 1993 and 1996, two full great season propel him past several Top10 players.