1) Better than any other 2) Category for a sports great 3) Ever 4) Ill mate remains unsurpassed 5) Like some records 6) Like the highest high 7) Never surpassed 8) Never-surpassed 9) Number-one 10) Past and present 11) Record 12) Record description 13) Record-owning 14) Throughout history 15) Type of record Found on https://www.crosswordclues.com/clue/all-time
adjective unsurpassed in some respect up to the present; `prices at an all-time high`; `morale at an all-time low`; `among the all-time great lefthanders` Found on https://www.encyclo.co.uk/local/20974
never surpassed or greater: Production will reach an all-time high. · regarded as such in its entire history: an all-time favorite song. Found on https://www.infoplease.com/dictionary/all-time