This is just my personal list :) I didn't include English.

5. French (Anais Delva)
I love the French language and Anais has a very beautiful voice, so it's a perfect combination. She has a soft voice compared to most other actresses, but she pulls it off and makes an overall great Elsa.
4. Russian (Anna Buturlina)
She has a really strong voice that fits Elsa nicely, and control too. Her voice is also really smooth, and clear too.
3. Swedish (Annika Herlitz)
Annika's version is sort of lower-pitched than the other ones, but it fits the language and still makes a beautiful song. I like her in the For The First Time In Forever reprise. She also has a very strong voice, which I like.
2. Polish (Katarzyna Laska)
Her voice is absolutely beautiful, in my opinion. She makes an awesome Elsa, her voice isn't strong nor soft, it's the perfect tone. I really love her version.
1. Japanese (Takako Matsu)
I've heard this version more than I can count. Matsu has an awesome voice, she performs Elsa perfectly. The language fits her voice, she fits the language. Her Elsa is definitely my favourite Elsa!