If he's got more short fiction on the level of "Surface Tension", I'd certainly like to read more, though.
I can't really make any useful recommendations because it's been 25 or 30 years since I read the Blish collections I have; I just remember enjoying the stories.
something by J.G. Ballard too (he's written too many excellent ones for me to choose).
I doubt Ballard would have been on the radar for this particular anthology, because most of his writing was done after the cutoff date for the book. Recommended reading for sure, though anyone who tries The Atrocity Exhibition should probably go for the Re/Search annotated edition.
If you like stuff like that try a German series called Perry Rhodan.
That'd be a bit of a challenge, wouldn't it? If you read German it'd take forever to catch up on 2000 or so stories, and if you don't you'd have to try to track down 130 or so English translations that were probably out of print by 1980. I read a lot of them back in the mid-'70s; I don't know that I'd recommend them, because I found they varied wildly in quality (could be translation and editing issues), and even the best were basically pulp space opera.