Hey Richard,
I don't mean to flog this subject to death, but...
Richard wrote:
<I think my fave Elvis soundtracks would be, say,  GI Blues and King  
Creole. I remember how pleased I was to figure out that "Tonight is  
so right for Love" from GI Blues used the melody from Offenbach's  
Barcarolle (from Les Contes d'Hoffman). It dawned on my while  
watching Mr and Mrs Bridge, in a scene when Mrs Bridge is visiting  
the Louvres. The classical/traditional borrowings for Elvis songs  
were always fun: there was Surrender, It's now or never, Can't help  
falling in love...>
I find something worthwhile on most soundtrack Lps up to Clambake.  Old MacDonald was a bit much.  But bonus tracks of "Big Boss Man" (which he re-did for '68 Special) and "You Don't Know Me" are cool.  
"Tender Feeling" was just a rewrite of Greensleeves and I believe, "Stay Away" is a rip of classical tune, but I've never been able to quite get it.
Among my 60's sountrack favs w/out stating the obvious Return To Sender, Viva Las Vegas, etc., and what we've already mentioned...
Follow That Dream, Echoes Of Love, Tender Feeling, Once Is Enough, Angel (lovely), Kissin' Cousins, King Of The Whole Wide World, Long Lonely Highway, Girl Happy (love that bridge!), Spring Fever, Wolf Call, Puppet One A String, Shout It Out, Pocketfull Of Rainbows, Flaming Star, So Close, Yet So Far, In My Way, What A Wonderful Life. I'm sure I'm missing a lot, but that's off the top of my head.
Richard also wrote:
<Yeah...the phrasing is exquisite. That's what a lot of people don't  
get about Elvis...sure, he didn't really write much, and his myth is  
so overwhelmingly larger than life, but his way with a melody was a  
rare and precious gift. Learned everything I know about singing from El.>
I couldn't have stated it better.  What a special gift.  Me too! 
Best,
Barry