Somalis from certain cities tend to have a strong accent like reer hargeisa for ex but it doesn't change the fact that they speak the standard Somali dialect. In waqooye, reer miye/baadiye people don't have a strong accent like their brethrens from hargeisa and speak just like the news broadcaster above and so are reer djibouti. Even though I have a djiboutian accent, it's very easy for me to understand reer hargeisa compared to reer kalkayo. Reer bari from bosaso also speak the standard Somali dialect from my experience because I wouldn't be able to tell the difference between a Somali from bosaso and a Somali from diredawa based on their dialect. Regional accents within the same Somali dialect can be troublesome for non native speakers like you guys. Reer mudug use O at the end of many words/sentences and even names and that makes mudug a different dialect than standard even though it's easy to understand since the structure of the words are different. It's simple for fobs to understand which dialect a Somali is speaking regardless of their accent.
I would divide Somali accents into macro categories . The typical division north vs benadir is very flawed.
Northern accent proper: somaliland, Djibouti maybe Bari region of PL
North Central accent: Mudug, galgaduud. For example Hawiyes in Mudug and galgaduud speak pretty standard compared to southern Hawiyes. Reer Gedo MX are originally from galgaduud and have this type of accent.
South-central : Hiiran, maybe southern galgaduud. They have a southern twist but still close to central accents.
Southerners accent proper: Mogadishu, maxaa tiiri speaking areas of shabeelaha and Jubbooyinka.
Each macro accent can be further divided into several regional groups. I think we can agree that the standard dialect is from the northern variety but I'm still not convinced which northern variety is the closest to the standard form