Hello
If they are really 4" in size, I guess they are all female. Only number 2 looks a bit like a male. Looks like it got some more interopercular odontodes. Large L204 are easy to sex. Males get a lot of odontodes on the tail. And most of them show them all the time. If not, you can still feel it very good with your hand. Also they get a lot of interopercular odontodes.
But males can also get quite fat/round, so with that you can not really differ them. I attach two pictures of some of my L204. First is a clear male and on second picture two female all 3 about same size.
Best regards,
Simon