Generals and analytics

There is also a good debate in whether or not he was a capable commander, many attribute the loss of the Battle over Britain to him as well as the decline over german air superiority over the course of the war

Leeb or Konev at full discount are recommended. Note: Konev does need some upgrading to make him show off his true talent.

To add at Nobunaga Oda's answer... Leonid Govorov really sucks in this game. He's not the guy in WC3 we used to know.

Infantry generals are completely optional because tank arguably outclasses Infantry as a main combatant. Infantry can still be useful to move in quickly to occupy cities and remove land mines and fortifications. But since Infantry generals are supposed to be used as a main damage dealer, they are arguably only useful on Commandos, which are outclassed by the Super Tank.
Tanks in general are supposed to be slow, but tanks in this game are practically as fast as infantry. They are also have much more HP and deal much more damage.

To give you an idea, the first useful type of infantry as damage dealer is the Motorized Infantry. Has low HP and mediocre damage. Has a damage boost against armored units (Armored Cars and Tanks) and is more mobile when walking on terrains, which to be honest isn’t that great. You can just circumvent the terrain, and some skills give damage boosts when on certain terrains. It can be useful to reach a valuable city, though. The damage boost  against armored units is 30% unupgraded, 40% with European tech and 50% with Pacific War tech. 

Meanwhile, the third type of tank is the Medium Tank, which has good HP and damage and has a good speed. Comes with a chance to attack again after destroying a unit. 50% by default, becomes 75% with Pacific War tech (The chance is as high as the chance to trigger Rumor when on LV 5) and becomes guaranteed with Cold War tech. Also has a damage bonus against Infantry units which can be high as 55%. Useful for killing Infantry especially, but is useful as a main attacker.

The only useful types of infantry as damage dealers are the Mechanized Infantry, which takes greatly reduced damage from mines (Only 10% with Cold War tech) and deals up to 70% damage against strongholds with Cold War tech, and the Commandos, which have variable skills. But the Mechanized Infantry is the 4th type of Infantry while the Commandos are the 5th or “Special” type. The Mechanized Infantry has mediocre HP and ATT, can become good with Tech. The Commandos have good HP and ATT.

Meanwhile, The 4th type of Tank is the Heavy Tank, one of the most powerful units in the game. Has high damage and HP as well as the same range as a Howitzer. Has air device equipped (Which means it takes reduced damage from airstrikes) and the same chance to attack again and the bonus against infantry from the Medium Tank. The 5th or “Special” type of Tank is the Super Tank, which is basically an OP version of the Heavy Tank. Best land unit in the game along with the Super Rocket. The Soviets have BOTH.

Those are some of the reasons the Tank outclasses Infantry as a main combatant. Even the second type of Tank, the Light Tank, has a skill which is the chance to attack again after killing the enemy, while the second type of Infantry, the Assault Infantry, is useless as a combatant. Only good to remove mines and occupy cities  quickly. You likely won’t ever use the Assault Infantry again after you get the tech upgrade that sends Motorized Infantry via parachutes instead.