(b) If such surviving husband or wife, as the case may be, or next of kin, or the person selected by them, be incompetent or unwilling, or if the husband or widow, or next of kin, neglects for thirty (30) days after the death of the person to apply for administration or to request that administration be granted to some other person, it may be granted to one or more of the principal creditors, if may be granted to one or more of the principal creditors, if competent and willing to serve;