OF course! That may be how many Christians will answer the headline question. After all, sainthood means being with God in everlasting happiness after death — as every believer seeks — whether or not one is declared a saint by the Catholic, Orthodox, Anglican or other Christian churches recognizing sanctity.
Christ himself declared the first saint: one of the two thieves crucified with Jesus, traditionally called Dimas, to whom our Lord promised, "Truly, I say to you, today you shall be with me in Paradise" (Gospel of St. Luke, 23:43).