I totally understand how you feel, I seem to fall in love with every male chicken I have ever met. The good ones are so charming.I just wanted to tell you I’m having the sand issue my two cockerels are soooo sweet and friendly. To my understanding it won’t last much longer but everyone thinks I’m crazy because they are my pets and I don’t want to have them eaten :/ they aren’t crowing yet so I have a little time but I’m heartbroken and my husband is really sad too! He’s a softie lol.
Here is an article about rehoming roosters in case there are any ideas on there that you haven't tried yet.
https://www.backyardchickens.com/articles/tips-for-re-homing-cockerels-and-roosters.78704/
Hope your boys find a wonderful home if they don't stay with you.