1986
As mentioned in the ThunderCats post, SilverHawks was a Rankin/Bass animated series, which also shares the same theme song composer—Bernard Hoffer, a Swiss composer and conductor. I believe this is him. Performers are still unknown at this point.
SilverHawks theme song lyrics
Tallyhawk!
Wings of silver, nerves of steel (Silverhawks!)
Partly metal, partly real (Silverhawks!)
Soaring through the highway of the heavens in their flight
Silverhawks, a rainbow in the night!Wings of silver, nerves of steel (Silverhawks!)
Partly metal, partly real (Silverhawks!)
Silverhawks!
Watch & listen