Losing the self is far worse. The best marriages are two selfish people. The worst — a selfish and a selfless. The muddle through is two selfless.
YOu are correct about the worst, but you have the other two reversed . . . IMHO
–adjective
1. devoted to or caring only for oneself; concerned primarily with one's own interests, benefits, welfare, etc., regardless of others.
2. characterized by or manifesting concern or care only for oneself: selfish motives.
Origin:
1630–40; self + -ish 1
Related forms:
self⋅ish⋅ly, adverb
self⋅ish⋅ness, noun
Synonyms:
1. self-interested, self-seeking, egoistic; illiberal, parsimonious, stingy.