>>149392813
I suppose you mean, "who are straight", because Dorothy and Joyce there aren't gay, they are bi.

Also
-I think Jacob was confirmed bi in the walkverse, so I guess he is bi here too, even though we have never seen him dating a guy so far in the dumbiverse, therefore, I am not including him in the list.
-Booster is non-binary, so no matter which gender he date, it will be gay. Also, I suspect him to be asexual.
-Alice hasn't been shown explicitly outright being interested with women, but if she isn't currently dating Billie right know she might as well be.

Anyway, with those three removed, the remaining characters that so far appear to still be straight are:
Joe, Amber, Sarah, Lucy, Tony, Walky, Sal, Jason and Roz.