I would say Rambone was very thick but not anywhere near as long as claimed. He definitely is in the Holmes range. I would guess rambone is/was about 9.5x 7.
I dont think any of the guys mentioned were close to what claimed. I think Evan Stone is long but not very thick, similar to Lee Stone. Evan is either good looking or "troll-looking" depending on your tastes.
Hershel Savage, while I dont think is that big, is a good actor by adult entertainment standards anyway.
White dudes in adult entertainment may not have Mandingo length but many have thick rods. Here is my list of dudes from my extensive pron viewing:
(Keep in mind, I try to use real sizes and not exaggerated claimed sizes)
Brandon irons:
Blonde.Probably about 8-8.5x6.5 (though he's short and has low exit point/very thick base). he does some choking type shit that might be a turnoff though. I have some clips of him fucking Tera Patrick on constant rotation and that shit is hot.
Julian:
Dair hair/looks.He used to be married to Jill Kelly and is very popular with women and the couples market (though he did start in bi movies). he does his own lines like Julian Big Cock seductions. He claims 9.5", But I would say he's a legit 8+ x6"
Billy Glide:
Muscular dude with a thick cock. Dark hair. Probably 8x7(maybe a little less than 7" girth, but looks close)
Erik Everhard:
Brown hair, muscular. Workls with hot chicks like Tera patrick. Probably between 7-8 length, but very thick, claims 7" girth.
Peter North, old standby: A lot of people dont like him, but I think the dude performs well and is big. I never see him mentioned with the big guys that much, but he is definitely bigger than most adult entertainment guys( maybe 8x6?). Plus- those famous loads.
Voodoo- Performs with his girlfriend, Nicole Sheridan. I think hes around 9x6.
I dont know of Latino ( I guess thats what you would call him) is acceptable, but Nacho Vidal is huge. I dont watch his stuff, but I think hes into the choking stuff too though.
You could always search for movies like "big dick white boys" or some shit like that. I know there are compilation movies and some of them focus on just white guys.