[Here's a nice oxymoron from an Inspector Appleby short story]:

Nothing was visible that did not almost ostentatiously blend with the whole.

***

[From The Penciled Frown, by James Gray: some excessive-consonant words and a flukey patron saint]:

***

He was repeating the names of those to whom he was being presented.

"Mr. Hirmmmmkenmmmm."

"Mrs. Barrtinddmmm."

"Miss Kinggytbbb."

***

Timothy brightened. "You believe in the gospel according to Saint Fluke."

***

[Some maledicta business from Wodehouse, in Pigs Have Wings]:

"To speak expleasantly, sir," he said, "I think the old ---- means to do the dirty on us."

It would perhaps have been more fitting had Sir Gregory at this point said "Come, come, my man, be more careful with your language," but the noun ---- expressed so exactly what he himself was thinking of the Hon. Galahad Threepwood that he could not bring himself to chide and rebuke. As a matter of fact, though ---- is admittedly strong stuff, he had gone even further than his companion, labelling Gally in his mind as a ****** and a !!!!!!.