He and his band are untainted by political skullduggery and economic interest, not to mention accusations of theft.
Big critic Neil Barofsky was ‘untainted by financial knowledge.’
Short on experience but untainted by Washington, this one is in touch with the people.
1570s, "to corrupt, contaminate," also "to touch, tinge, imbue slightly" (1590s), from Middle English teynten "to convict, prove guilty" (late 14c.), partly from Old French ataint, past participle of ataindre "to touch upon, seize" (see attainder). Also from Anglo-French teinter "to color, dye" (early 15c.), from Old French teint (12c.), past participle of teindre "to dye, color," from Latin tingere (see tincture). Related: Tainted; tainting.