Maybe make 4 ♂ symbols and 4 ♀ symbols (if you know there will be 8 cases together) and shuffle them? Oh, I guess even in that case someone would complain if one set of symbols happened to get predominantly at the top of the article, and other set at the bottom of the article...

So probably it is best to alter them like this: ABABABAB... or maybe like this: ABBAABBA... with a coin flip deciding who is A and who is B.

Precisely for this reason, there was a time when I wrote in Elverson pronouns (basically, Spivak pronouns) for gender ambiguous cases. So, if I was writing about Bill Clinton, I would use "he," and if I was writing about Grace Hopper, I would use "she," but if I was writing about somebody/anybody in would use, I would use "ey" instead. This allows one to easily compile the pronouns according to preference without mis-attributing pronouns to actual people... I've always planned on getting around to hosting my own blog running on my own code which would include an option to let people set a cookie to store their gender preference so they could get "she by default", "he by default", "Spivak by default", or randomization between he and she -- with a gimmick option for switching between different sets of gender neutral pronouns at random. The default default being randomization between he and she. But I haven't gotten around to writing the website to host my stuff yet, and I just use unmodified blogger, so for now I'm doing deliberate switching by hand as described above.

(I think I could write a script like that for blogger too, but I haven't bothered looking into how to customize blogger because I keep planning to write my own website anyways because there are a lot of things I want to differently, and that's not necessarily the one that's at the top of my list.)

IME I've mostly found that using plural pronouns without calling attention to them works well enough, except in cases where there's another plural pronoun in the same phrase. That is, "Sam didn't much care for corn, because it got stuck in their teeth" rarely causes comment (though I expect it to cause comment now, because I've called attention to it), but "Sam didn't much care for corn kernels, because they got stuck in their teeth" makes people blink.

(Of course, this is no different from any other shared-pronoun situation. "Sam didn't much care for kissing her boyfriend, because her tongue kept getting caught in his braces" is clear enough, but "Sam didn't much care for kissing her girlfriend, because her tongue kept getting caught in her braces" is decidedly unclear.)