Since 2014-15, Jon Rahm has the most top ten finishes / events played / 10, with 5.09.

who has the highest percent of top ten finishes per ten event since 2015
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RahmJohnsonMcIlroyMorikawaThomasSpiethRoseCantlaySchefflerZalatorisKoepkaFitzpatrickDayCaseyDeChambeauSchwabMatsuyamaSimpsonFowlerHattonSchauffeleScott5.094.864.753.873.713.473.443.43.383.333.223.113.112.882.792.732.72.652.652.642.622.58
NAMEEVENTSTOP 10/(EVENTS/10)TOP 10WINSROUNDSMONEY
Jon RahmJon Rahm1105.09566401$31,031,618
Dustin JohnsonDustin Johnson1444.867016522$49,801,917
Rory McIlroyRory McIlroy1224.755810438$36,555,996
Collin MorikawaCollin Morikawa623.87245225$17,623,056
Justin ThomasJustin Thomas1783.716614638$46,699,999
Jordan SpiethJordan Spieth1673.475812594$42,189,688
Justin RoseJustin Rose1313.44454456$27,169,391
Patrick CantlayPatrick Cantlay1033.4356367$24,907,402
Scottie SchefflerScottie Scheffler653.38224231$17,437,041
Will ZalatorisWill Zalatoris123.334040$2,660,212
Brooks KoepkaBrooks Koepka1523.22498518$36,861,834
Matt FitzpatrickMatt Fitzpatrick453.11140152$5,910,954
Jason DayJason Day1483.114610488$31,960,885
Paul CaseyPaul Casey1532.88442539$25,474,900
Bryson DeChambeauBryson DeChambeau1222.79348415$25,678,435
Matthias SchwabMatthias Schwab112.733040$766,486
Hideki MatsuyamaHideki Matsuyama1742.7477623$35,239,142
Webb SimpsonWebb Simpson1622.65433580$25,271,465
Rickie FowlerRickie Fowler1552.65414549$25,497,202
Tyrrell HattonTyrrell Hatton722.64191241$10,681,760
Xander SchauffeleXander Schauffele1262.62334446$24,313,571
Adam ScottAdam Scott1282.58333466$20,751,497
Viktor HovlandViktor Hovland552.55143196$10,834,303
Tiger WoodsTiger Woods522.5133191$11,282,792
Matt KucharMatt Kuchar1752.46432618$23,211,154
StatMuse has season-level data for events played and top ten finishes going back to the 1979-80 season.