Boston’s Ben Affleck, who made it clear on Monday that he will not be running for office in Massachusetts (at least not now), was ranked No. 13 on DoSomething.org’s fifth annual “Top 20 Celebs Gone Good” list. Affleck was praised for his work with the Eastern Congo Initiative. No. 4 on the list was Lady Gaga, who started the Born This Way Foundation with the Berkman Center for Internet & Society at Harvard University earlier this year. Former Hyannis Port regular Taylor Swift, who received the Ripple of Hope Award from the Robert F. Kennedy Center for Justice and Human Rights this month, took the No. 1 spot.