Mordekaiser is, with Kalista, the only champ I know with only 3 abilities to be used in a solo lane

And Kalista is an ADC from the beginning, so she has most likely a partner to use her ult. Even Tahm Kench can ult alone (he doesn't have to but he can ult alone) and eat not only allies, but enemies and minions too.

EDIT: Soraka heal, thats right, BUT she heal heal herself through her Q too, her W is only for allied heal, but still Soraka W, that's right, but Soraka is NORMALLY, too, played as a support and not in other lanes.