I don't think anything can top anni4, the whole scene in the ocean.
For individual moment... I really loved Snow when he was explaining to Arthur about the parallel between the twins with Oz and Arthur's mother with him... I also loved when Snow explained to Akira about their prophecy ability, and how he's like "some people get really happy when they hear good news, and that makes us happy". It's such a good spin on the helpless seer trope, you know.
For White... When he's like "back off, oz, our stupid northern kid can swallow a cursed bird if he wants to!" During candy house when he ask Akira to check on Owen cause he's worried for the baby... God I wish there's more White-Owen moments. Not to give the twins more kids to abuse but I think White should take custody of Owen. If he tries enough time he can get it right I believe in him.