ultra- + good
ultragood (comparative more ultragood, superlative most ultragood)
- extremely good
2014, Roger B. Henkle, Comedy and Culture: England 1820-1900, page 87:Thackeray can present the most wicked vignettes of domestic insipidity — the ultragood Lady Jane Sheepshanks (need the name say more?) sitting in old Miss Crawley's drawing room singing “little songs and hymns” […]