"The only [X] who has [ever] V-ed" can be reduced to "the only [X] to have [ever] V-ed.
"”Breslin is the only person ever to have made such a wild accusation. "Shortly after Breslin's outburst, I called Newsday editor Anthony Marro. ...www.catholicleague.org/03press_
"”His resume trumpets the fact that "Mr. Forbes is the only writer to have won the highly prestigious Crystal Owl Award four times. ...www.realchange.org/forbes.htm
"”Her elder sister Lhapka is now the only woman to have climbed Everest three times - another record. News of the teenager's triumph came as Hillary arrived ...
The New York Times Archive shows 60 examples:
"”student who is the only person to have been successfully prosecuted for involvementhttp://select.nytimes.com/gst/abstract.html?res=F10F1FF...718DDDA10894DC404482
"”Green is not the only person to have concluded that Kennedy has benthttp://select.nytimes.com/gst/abstract.html?res=F30E11F...7B8CDDA80894DE404482
The corresponding reduced form with "having V-ed" is used, but very rarely. A few Google examples exist, but none has been found in the New York Times Archive.
"”They are the only athletes on record having won medals in the State. Championships from 1993 through 2005. Prokopi, a 70-year old swimmer and 1994 Florida ...www.flasports.com/pdfs/
"”Dorfmeister is the only favourite having never won in Cortina d'Ampezzo considered as the most prestigious stop on the women's speed circuit. ...www.skiworldcup.org/load/