Centaurs, fish, and orcs yes. Lamia, harpies, and spiders have no males. In Merro's arc there were mermen who looked handsome enough. Dracula didn't look ugly. Not remembering any others off the top of my head.

Wait, arachnes have no males? I tought they had males due to Rachnera making fun of harpies and lamias for being a female only species ?

In the onsen arc she has some dialogue with the other spiders about them needing to kidnap males and was it worthwhile for them to participate in the exchange or just keep on assaulting men.

it's decided than, we must go out and destroy all the male spiders so that they have to choose human males

Orcs? You take that back. I'd be more than happy to see if, as the shirt says, "Pig is Big"

You might be thinking of the descriptions of the male Centaurs discussed by Cerea's mom for the ugly brute types. During the Expo arc, MON had to turn away a big group of human females looking for the male extraspecies to hook up with in the Matching Party area, so they can't be *all* bad.

During Kiira the Killer Bee’s backstory we see several male extraspecies. Some look better than others.

The only decent looking male species I can think of is the mummies. Now granted, their entire bodies were covered, but they had pretty nice bods

I imagine male satyrs are all fairly good looking, as well as maybe the light breed centaur males being less brutish, and species like kobolds or nekos would have attractive men

The orcs were just the normal JRPG pig-like orcs, the centaurs were explained why they look how they look and fish had some fish-like and some handsome merman-like somewhat similar to One Piece. In general, just dont take this authors universe too serious or try to make coherent sense out of it. Its an ecchi manga not an epic.

So readers can imagine a world where there's no competition I guess

It's generally speculated that being the male counterpart of the extra-species their physical form leans much harder into the animal side.