Songs of that era were dominated by three SL dudes; Hadrawi, Abdi Qays (AUN) and Gariye (AUN). They were about their life journey and adventures. They all had a story and a meaning.
No doubt Beledweyne is one of the all time greatest songs because of its composition, sophisticated lyrics, narrative, story/event and the overall structure which was very innovative and unique. He broke many rules and defined new ones in that song...it pave the way.
#1 Beledweyne for me
As for the other two, I don't consider them in the top five but all were written by Hadraawi (Beledweyne, Nayruus and Hooyo).
That's why Hadraawi is the #1 Abwaan.
That is why Beledweyn was number 1 for me.
As regards composers, do not forget to add Hassan Geni, Mohamed Cali Kaariye, Hassan Sheikh Mumin, Sahal Macalin Ciise and Ahmadeey Abdi Gaashan.