Possessing a smaller voice, Krössing impressed audiences not with his vocal prowess but with his dramatic gifts.

He is particularly remembered for creating roles in several world premieres by Bedřich Smetana and Antonín Dvořák.

In September of that same year he played Wenzel in the premiere of the final version of Bedřich Smetana's opera The Bartered Bride, a role which he would repeat often throughout his career.

His portrayal in this production impressed Smetana, and Krössing was soon invited to join his group of artists that would later be established at the Prague National Theatre.

He sang in two premieres of operas by Smetana, singing Skřivánek in The Secret (1878) and Michǎlek in The Devil's Wall (1882).

He also sang in the premiers of five operas by Antonín Dvořák; the roles of Jean in The Cunning Peasant (1878), Toník in The Stubborn Lovers (1881), Benda in The Jacobin (1889), the Gamekeeper in Rusalka (1901), and Sven in Armida (1904).