Though I think when it comes to Hobbs and scoring centuries in his forties looking around the late twenties-early thirties is more important. And I'm thinking in terms of guys who'd have the keeper back, not the 120s Bedser type fast medium (given he compared himself to Cartwright).
Between his fortieth birthday in December 1922 and the end of the 1930 English season, when he last represented England aged 47, Hobbs scored 20,530 first-class runs at an average of 60.02, with 76 centuries. He had 378 innings.
In exactly one third of those innings,126, there was at least one fast bowler in the opposition. Chronological list as follows:
English: Arthur Gilligan (pre-injury while still fast), Gubby Allen, Larwood, Nichols, Voce, Bowes, Nobby Clark
West Indian: George Francis, Constantine, Herman Griffith
Australian: Tim Wall, Gregory, McDonald, John Scott (South Australia)
Between the ages of 40 and 47, Hobbs' record in first-class matches when these 14 bowlers opposed him was 6,552 runs, average 57.98, with 19 centuries.
He scored at least one century against all of them, apart from Bowes and Clark, against whom he only played four innings, passing fifty each time.
Hobbs was dismissed 113 times in these games, but only on 28 occasions by the quicks. Larwood got him seven times and McDonald five. Unlike other English batsmen, he rarely had much trouble with Gregory, either before or after his fortieth birthday.
The West Indian George Francis dismissed him cheaply the first three times they met, but Hobbs followed up with a couple of hundreds and a fifty. Gubby Allen had sixteen attempts to get him out and never succeeded, Hobbs averaging 87 with a highest score of 316*.