Formal:
* Te desiderabimus. (This is the most direct translation and is appropriate for formal situations.)
More emotional:
* Te nobis desiderabimus. (This emphasizes the "we" and the feeling of missing the person.)
* Te carissime, desiderabimus. (This adds "dearly beloved" to the sentence, making it more affectionate.)
Poetic:
* Memoria tua nos semper commovebit. (This means "Your memory will always move us," which is a more poetic way of saying "We will miss you.")
The best translation for you will depend on the context and the specific message you want to convey.