I may have worked this out just because I want this to be the answer.

The happy person is HANDEL (“Happy we!” from Handel’s Acis and Galatea) The horse that appears is a NAG Take us out and put you in because you are the MAIN man( that’s the weakest part)

An anagram of

DANIEL HAGMAN

I really hope that this is true Hagman is my favourite character and if I may could I take this chance to recommend the music of John Tams. His blend of folk and misery is a real joy.

Michael Davidson