- Just using "he" (can come off as sexist)
- Just using "she" (can come off as overcorrection)
- Alternating between "he" and "she" (potentially confusing)
- Using "He or she" (awkward)
- Using "They" (technically incorrect)
- Making up a new word (people probably won't know what you mean)
There simply isn't a good answer. Acknowledge that whatever choice you make, the other choices are equally valid, and someone who doesn't make the same choice as you isn't dumb or wrong or a jerk.