My best candidates are Southwest Africa and Libya respectively, even post-Great War. If Germany retained SWA they possess a small empire, the incentive is to invest more to make it useful, something bigger empires lack as everything is spread wider. Same for Italy in Ljbya. Both offer the potential for Europeans to outnumber natives or create independent native states that remove them. In my draft Germans move to SWA like Americans did Florida, large retiree population, Windhoek looks like Las Vegas, a big air base, tourist industry, maybe the atomic test site, large suburbia. I carve off Ovamboland to a separate state, akin to an Indian reservation with local rule, and in Libya I just allow Italians to either emigrate enough, oil industry drawing in workers and investment.
Somalia could get a boost from European minority, like a lot of places, but no "white" majority. Without both wars or just WW2, European investment will flow to select holdings, making a few more look like SA, higher investment and development, bigger minority, more pressure to European-ize. France could do something similar to Algeria, Germany in East Africa, and so on. Without a USSR or other disrupter, the struggle to independence is different. More of the empire system persists, the British islands in the Caribbean or Aden or Singapore behave more like HK. Local majority ruled by British minority who share enough to hold on even as the larger world breaks away.