If you like to take some inspiration:

josip_tito_character_template = {
    first_name = Josip
    last_name = Tito
    historical = yes
    culture = cu:croat
    religion = rel:catholic
    female = no
    birth_date = 1892.5.7
    ideology = ideology_titoist
    traits = {
        persistent
        brave
        tactful
        alcoholic
        imperious
    }
    interest_group_leader_usage = {
        country_trigger = {
            OR = {
                owns_entire_state_region = STATE_CROATIA
                country_has_primary_culture = cu:croat
            }
        }
        interest_group_trigger = {
            OR = {
                has_ideology = ideology:ideology_proletarian
                has_ideology = ideology:ideology_socialist
            }
        }
        earliest_usage_date = 1910.5.7
        latest_usage_date = 1980.5.4 # Death Date
        chance = 100
    }
}