In my experience, control decks like to run a bunch of removal and counters to stall the game long enough to be able to play big bombs, the most common at the moment being Elspeth, Sun's Champion. These decks generally run very few creatures.
Soldier of the Pantheon is an aggro card that doesn't belong in a control deck.
Ajani's Pridemate is best when in a deck that focuses on gaining life. Otherwise it's just a 2/2 for 2 which is nothing special.
Spellheart Chimera is best in a UR counter-burn deck which this kind of is, but would need some changes.
Thassa's Dissipate will only ever be "Counter target spell unless it's controller pays 1" because Spellheart Chimera is the only permanent that provides blue devotion. If you don't have a Chimera out it's a dead card.
If you want to go the typical full counter route, drop the white creatures and add some sweepers (as you said) and some big bombs. Sweepers I can think of: Anger of the Gods Mass Calcify and End Hostilities which will be printed in Khans of Tarkir.
If you want to go the counter-burn deck route, drop the white creatures and add more creatures that synergize with spells. I honestly couldn't tell you what this deck would look like because I play 0 standard, but I'm sure someone on these forums could help out if you want to do that.