Haven't seen it for a while but recall it as more than a bit campy. The other high water mark in the "Chicks in Chains" genre to double bill it with is is CHAINED HEAT, with Linda Blair in Eleanor's role, plus hot, steamy and sadistic Sybil Danning taking care of the lesbo shower action, Stella Stevens as Hope Emerson, and John Vernon in the Agnes Moorehead role as warden (complete with a hot tub in his office and a video camera).
I'm big on Eleanor too - have seen all her cinema movies. Of those you've listed THE NAKED JUNGLE is by far the best - a great classic era adventure. THE SEVENTH SIN was underrated I thought. I preferred Eleanor over Garbo and Naomi Watts. DETECTIVE STORY good but her part surprisingly small, despite her prominent billing and Leading Actress nomination. Lee grant (Best Actress at Cannes I think) probably got more mileage out of it.
Make sure you check out SCARAMOUCHE, probably her finest hour - absolutely ravishing in a part declined by Ava Gardner. And for my money probably the genre peak for swashbucklers.
Of her earlier star efforts THE VERY THOUGHT OF YOU and WOMAN IN WHITE are well worth seeking out.
BUSSES ROAR is a very early B about axis agents and a bomb on a bus... the SPEED of 1942 if you like only Julie Bishop is Sandra and Richard Travis is Keanu - Eleanor gets dull second lead role. A fun 60 minutes though. Another supporting part in CRIME BY NIGHT (1944 but I think filmed earlier in 42) as a mystery woman in lightweight crime caper with Jane Wyman & Jerome Cowan as a poor man's Nick & Nora.
THE MAN WITH THE GOLDEN ARM was an important credit but some find her shrewish wife overdone (although in truth anyone stood next to Kim Novak looks like a ham!). Novak had the more sympathetic role... the dreamy doormat "B Girl" who helps Sinatra go cold turkey.
The failure of LIZZE and THE SEVENTH SIN in 1957 caused MGM to lose interest in her and she started a family in the late 50s... which explains the quite sudden deterioration in her roles/films of the 60s..She was simply an old fashioned girl and her family came first... she was still on the marquee but now usually below the new girls (Carol Lynley, Elke Sommer, Ann-Marget, etc).
She's a hoot as a love hungry agent in the hilarious THE OSCAR, and her participation in the truly atrocious AN AMERICAN DREEAM ("in a one scene role of screaming bitchery that has to be seen to be believed" L Halliwell) is the stuff of legend. In fact few are more entertaining overplayers than Eleanor. See SHE'S DRESSED TO KILL , a TV movie from 1979 too if you like her in that vein.
Her last good movie would be EYE OF THE CAT, a highly effective thriller.