What a lovely story. When I do voices for my kid it feels pretty lame to me. Not my strong suit. But he seems to like it.
I can do Arnold Ziffel (pig from Green Acres).
I do a pretty damn good Beavis and Butthead.
I am semi ashamed to admit I do a pretty passable Eric Cartman.
Another Mickey Mouser. “Oh, hello Pluto.” is my go to line but I do others. I have a grandkid now who is into Mickey so I’m dusting it off and getting it up to speed. I can also do angry Donald Duck.
I do Joe Besser (fake Curly number 2) stumbling over saying “cinnamon” as on The Joey Bishop Show. Something so obscure I can’t find video of it.
OTOH, doing the real Curly is hardly oddball. Nyuk, nyuk.
No “really big shoe”?
Very cool!
What I was a kid I could do Mickey Mouse and Donald Duck.
At D&D games I sometimes do a very creepy Peter Lorre.
I couldn’t do much in Donald’s voice, haven’t even tried in years, but I used to interject the “Donald Duck!” exclamations into the Mickey Mouse Club song with a decent imitation. I still say them when the opportunity presents, but just my own voice.
My brother could do Donald Duck very well, but I’ve never been able to. I can’t do Rocky the Flying Squirrel either. I just can’t get June Foray’s raspy “All-American boy” voice at all.
For the longest time I could do the male cast of Star Trek, but not Kirk. Finally, I came across an article in TV Guide or People (I forget which) comparing Kirk to Picard. It described Bill Shatner as “a hammy Shakespearean actor who speaks in short, choppy sentences” and I had this sudden “THAT’S IT!” moment. From then on, it was easy.
“Shields Keptin? SHIELDS Keptin??”
I can do an exaggerated “close captions sponsored in part by…” from Johnny Gilbert of Jeopardy. I used to do the whole intro: " This. Is. Jeopardy! Now entering the studio are today’s contestants!", back when the contestants had to awkwardly walk to their podiums.
In seven languages? 
Naw, just Pig Latin.
My favorite James Mason–Richard Burton bit is the meeting between Erwin Rommel and Captain MacRoberts in The Desert Rats, which goes something like this…
Rommel: [To adjutant] Some cognac for the Captain!
[MacRoberts takes the cognac.]
Rommel: [To MacRoberts] If I wanted to take Tobruch, I would crush it as if it were a fly!
MacRoberts: Well, why don’t you take Tobruk then?
Rommel: [Coughs because of his wound.]
MacRoberts: [To Rommel’s adjutant] Some cognac for the Field Marschall!
Two impressions for the price of one!
Oh, fer… 
The thing about Burton is if you can do an Anthony Hopkins impression…you’re halfway there.
One time I was at a bar, and the Doobie Brothers’ “What a Fool Believes” came on. I started singing along and did a perfect imitation of Michael McDonald, if I do say so myself. My friends did not agree, though.
I also sing much better the more I have to drink. And I’m better looking and wittier as well.
Mike from Breaking Bad (Saul’s “fixer”). It helps to look a bit like him. And you do a lot of heavy-eye lid staring.
And I once played a local politician named Bob Guhl (rhymes with ghoul - really) by dressing in a jacket and tie while wearing a monster mask. I kind of liked the simplicity of that one.
Yeah, that’s my other standard.
“We kin hep yew, but only if yew eat less than 200 calories a day fer de nex mont.”