[Ruy Dias de Bivar]

I remember lots of those shows that had “father figures” often with orphaned boys.
Casey Jones
Rin-tin-tin
Fury
Captain Gallant of the Foreign Legion

Only Lassie’s Timmy seemed to have a mother figure and he kept falling in the well.

[MayflowerMadam]

Don’t forget Sky King where the uncle (I think) raised Penny and her brother.