I thought she was just bitten by the same Spider?
Ben Reilly, Kaine, Ultimate Spider-Woman, Spidercide, Superior Spidey after Clone Conspiracy/Dead No More etc. are clones though.
Not sure if you'd trust any though. Ben you could use to but he's been on/off a villain since his revival.
In a "Timey Wimey" way comics Vision can be considered a clone of the original Human Torch I think despite them being robots.
Pretty sure some versions of Bizzaro have been more 'innocent' than others and therefore trustworthy. Also Conner Kent.