Superior Venom vs Thor
When the Superior Spider-Man had the symbiote temporarily bond with him, he caused mass mayhem and even took on the Avengers to the point Captain America was calling for urgent backup.
Thor was among those who was facing Spider-Man, but of course there were a lot of distractions and chaos all around them.
Here are scans from the fight:
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom1.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom2.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom3.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom4.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom5.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom6.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom7.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom8.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom9.jpg
http://i1197.photobucket.com/albums/aa440/sadisticjester/Random/venom10.jpg
The fight ends with Spider-Man breaking free of the symbiote's control and thus ending the fight.
In a 1 on 1 fight to the finish (and Spider-Man ISN'T trying to break free from the symbiote's control), who takes the majority?