Ruin a band name by changing one letter

RIP Jeff.

Cello (80s band mostly remembered for their homage to Sean Connery, "Oh Yesh")

PiL Scott-Heron

INXL

The Hen they couldn't Hang

Slack Rebel Motorcycle Club

Johnny Hazes Jazz
Martha and the Puffins
The Potus Eaters

She Carpenters
Mensfear
Black Lice
Brian End
Lou Peed
Notion of Ulysses
Grass (famed for their 1982 critique of the Beano: Denis Envy)

PiL Scott-Heron

I like this form best - wordplay, but also conjuring a stylistic mash-up

It has no place in this thread, but I always liked the idea of ‘Hawk, Wind and Fire’ in that respect. Not sure Lenny Kilminster ever had a disco side-project.

In which case, I can highly recommend the Wugazi album

Ass

Pariah Carey
Feline Dion
Joan Armstrading
Tears for Mears
Spandau Pallet
Pet Shoe Boys
Frasure
Any Winehouse
Brian Uno

for the fish lovers...

Cod Stewart
Perch Sledge
Primal Bream
Black Dace

Supercrass
Bodgy
The Jackson Live
Steeper
Fine Young Hannibals
Jeezer
Foploader
No Solid Crew
Boy Better Snow

Everything bit the girl

Steeper

Is that Steeler or Sleeper?🤔

Although Yngwie Malmsteen's guitar behind Louise Wener's vocals might be worth a try.

conjuring a stylistic mash-up

I was disappointed to discover that somebody already cited Spandau Mallet, although I'm surprised @Buz didn't mention their first hit, "To cut an itsy witsy teeny weeny yellow polka dot bikini short".

Ace :-)

Steely Ian

Between 70s British Soul-Funk and 90s Trip Hop, there was a little known period when Róisín Murphy fronted Tony O'Malley's band. Ladies and gentlemen, please welcome...Kokoko!

I feel this thread is max gap between fun to post vs fun to read

Nail on the head :-)

So, you love your suggestions and hate ours?

I think the trick is to make a name that’s funny, rather than just identifying that a different word can be made and going with that.

(I would count many of my own amongst the latter group, by the way)